diff --git a/contract.sol b/contract.sol
index 95ec7b8..f137a72 100644
--- a/contract.sol
+++ b/contract.sol
@@ -1,123 +1,126 @@
-pragma solidity >=0.5.0 < 0.6.0;
-contract TokenReward {
-    
-    struct Member {
-        uint8 rating;
-        string name;
-        bool isWhitelisted;
-        uint8 accumulatedPoints;
-    }
-    
-    address owner;
-    mapping(address => Member) public members;
-    mapping(address => uint ) public reward;
-    mapping(address => bool ) public admins;
-    mapping(address => uint ) public balances;
-    
-    event NewMember(string _name);
-    event Blacklisted(address indexed _member, string _name);
-    event NewReward(address indexed _member, uint reward);
-    event NewRating(address indexed _ratedBy, address indexed _memberRated, uint rating);
-    
-    modifier OnlyOwner() {
-        require(msg.sender == owner, "Only contract owner is allowed to call this function");
-        _;
-    }
-    
-    modifier OnlyAdminOrOwner() {
-        require(admins[msg.sender] == true, "Only admins or contract owner is allowed to call this function");
-        _;
-    }
-    
-    modifier IsWhitelisted(address __member) {
-        Member memory  memberStruct = members[__member];
-        require(memberStruct.isWhitelisted == true, "This address is not whitelisted");
-        _;
-    }
-    
-    constructor () public {
-        owner = msg.sender;
-        admins[msg.sender] = true;
-    }
-    
-    function addAdmin(address __newAdmin) public OnlyOwner returns(bool) {
-        admins[__newAdmin] = true;
-        return true;
-    }
-    
-    
-    function AddMember(address __member, string memory __memberName) public OnlyAdminOrOwner returns(bool) {
-       Member memory __memberStruct;
-       __memberStruct.name = __memberName;
-       __memberStruct.isWhitelisted = true;
-       members[__member] = __memberStruct;
-       
-       emit NewMember(__memberName);
-       return true;
-    }
-    
-    function whiteListMember(address __member) public OnlyAdminOrOwner returns(bool) {
-       Member memory  memberStruct = members[__member];
-       memberStruct.isWhitelisted = true;
-       return true;
-    }
-    
-    
-    function blackListMember(address __member) public OnlyAdminOrOwner returns(bool) {
-       Member memory  memberStruct = members[__member];
-       memberStruct.isWhitelisted = false;
-       return true;
-    }
-    
-    
-    function isWhitelisted(address __member) view internal returns(bool) {
-        Member memory  memberStruct = members[__member];
-        return memberStruct.isWhitelisted;
-    }
-    
-    function rateMember(address __membertorate) public IsWhitelisted(__membertorate) returns(bool) {
-        Member memory __memberStruct = members[__membertorate];
-        uint8 ratingPoint;
-        require(admins[msg.sender] || isWhitelisted(msg.sender), "You're not qualified to rate any member");
-        if (admins[msg.sender]) {
-            ratingPoint = 3;
-        } 
-        if (members[__membertorate].rating == 5) {
-            ratingPoint = 2;
-        } else {
-            ratingPoint = 1;
-        }
-        __memberStruct.accumulatedPoints =  __memberStruct.accumulatedPoints + ratingPoint;
-        
-         (uint8 __memberPoint, uint8 __starRating) = calculateReward(__memberStruct.accumulatedPoints, __memberStruct.rating);
-        __memberStruct.accumulatedPoints = __memberPoint;
-        __memberStruct.rating = __starRating;
-        
-        emit NewRating(msg.sender, __membertorate, ratingPoint);
-        return true;
-    }
-    
-    function rewardMember(address __memberToReward) public OnlyAdminOrOwner returns(bool) {
-        require(admins[__memberToReward] == false, "admins cannot be rewarded tokens");
-        require(members[__memberToReward].rating >= 3, "member do not have a proven track record");
-        balances[__memberToReward] = balances[__memberToReward] + 2;
-        return true;
-    }
-    
-    function calculateReward(uint8 __pointsScored, uint8 __starRating) pure internal returns(uint8, uint8) {
-        if (__pointsScored < 10 ) {
-            return (__pointsScored, __starRating);
-        }
-        uint8 __pointremained = __pointsScored % uint8(15);
-        if (__starRating < 5) {
-            uint8 currentStarRating = __starRating + uint8(1);
-            return (__pointremained, currentStarRating);
-        }
-        return (__pointremained, __starRating
-        );
-    }
-}
-
-
-
-
+pragma solidity >=0.5.0 < 0.6.0;
+contract TokenReward {
+    
+    struct Member {
+        string name;
+        bool isWhitelisted;
+        uint8 accumulatedPoints;
+        uint8 rating;
+    }
+    //Mappings
+    address owner;//Our state variable
+    mapping(address => Member) public members;//each Member has an address
+    mapping(address => uint ) public reward;//captures the reward in uint of each address
+    mapping(address => bool ) public admins;//captures the addresses that are admins or not
+    mapping(address => uint ) public balances;//captures the balances in uint of each address
+    //Events
+    event NewMember(string _name);//Trigers when a new name is added
+    event Whitelisted(address indexed _member, string _name);
+    event Blacklisted(address indexed _member, string _name);//trigers new blacklisting
+    event NewReward(address indexed _member, uint reward);//trigers new reward and the member
+    event NewRating(address indexed _ratedBy, address indexed _memberRated, uint rating);//trigers new rating
+    //Modifiers
+    modifier OnlyOwner() {
+        require(msg.sender == owner, "Only contract owner is allowed to call this function");
+        _;//This allows only the owner to make changes
+    }
+    
+    modifier OnlyAdminOrOwner() {
+        require(admins[msg.sender] == true, "Only admins or contract owner is allowed to call this function");
+        _;//This allows only admin or owner to make changes
+    }
+    
+    modifier IsWhitelisted(address __member) {
+        Member memory  memberStruct = members[__member];//Any member that is whitelisted is now called memberStruct
+        require(memberStruct.isWhitelisted == true, "This address is not whitelisted");
+        _;//This allows only whitelisted member to make changes
+    }                
+    
+    constructor () public {//Only the owner of the contract will call this
+        owner = msg.sender;
+        admins[msg.sender] = true;
+    }
+
+    //This function helps to add a new Admin and can be called only by the owner
+    function addAdmin(address __newAdmin) public OnlyOwner returns(bool) {
+        admins[__newAdmin] = true;
+        return true; 
+    }
+    
+    //This adds a new member and can be called only by admins and the owner
+    function AddMember(address __member, string memory __memberName) public OnlyAdminOrOwner returns(bool) {
+       Member memory __memberStruct;
+       __memberStruct.name = __memberName;
+       __memberStruct.isWhitelisted = true;
+       members[__member] = __memberStruct;
+       
+       emit NewMember(__memberName);
+       return true;
+    } 
+    //This function whitelist a member and can be called only by admins and the owner
+    function whiteListMember(address __member) public view OnlyAdminOrOwner returns(bool) {
+       Member storage  memberStruct = members[__member];
+       memberStruct.isWhitelisted = true;
+       
+       emit Whitelisted(__member, memberStruct.name);
+       return true;
+    }
+    
+
+   //This function blacklist a member and can be called only by admins and the owner
+    function blackListMember(address __member) public view OnlyAdminOrOwner returns(bool) {
+       Member storage  memberStruct = members[__member];
+       memberStruct.isWhitelisted = false;
+        
+       emit Blacklisted(__member, memberStruct.name);
+       return true;
+    }
+    
+   // This function checks if a member is whitelisted or not
+    function isWhitelisted(address __member)internal view returns(bool) {
+        Member memory  memberStruct = members[__member];
+        return memberStruct.isWhitelisted;
+    }
+    //This function rate a member and can be called by whitelisted members
+    function rateMember(address __membertorate) public IsWhitelisted(__membertorate) returns(bool) {
+        Member storage __memberStruct = members[__membertorate];
+        uint8 ratingPoint;
+        require(admins[msg.sender] || isWhitelisted(msg.sender), "You're not qualified to rate any member");
+        if (admins[msg.sender]) {
+            ratingPoint = 3;
+        } 
+        if (members[__membertorate].rating == 5) { 
+            ratingPoint = 2;
+        } else {
+            ratingPoint = 1;  
+        }
+        __memberStruct.accumulatedPoints = __memberStruct.accumulatedPoints + ratingPoint;
+        
+         (uint8 __memberPoint, uint8 __starRating) = calculateReward(__memberStruct.accumulatedPoints, __memberStruct.rating);
+        __memberStruct.accumulatedPoints = __memberPoint;
+        __memberStruct.rating = __starRating;
+        
+        emit NewRating(msg.sender, __membertorate, ratingPoint);
+        return true;
+    }
+    //This function rewards members
+    function rewardMember(address __memberToReward, uint8 __rewardAmount) public OnlyAdminOrOwner returns(bool) {
+        require(admins[__memberToReward] == false, "admins cannot be rewarded tokens");
+        require(members[__memberToReward].rating >= 3, "member do not have a proven track record");
+        require(__rewardAmount <= 2, "Not more than 2 tokens can be rewarded");
+        balances[__memberToReward] = balances[__memberToReward] + __rewardAmount;
+        return true;
+    }
+    //This function helps calculate the members' reward base on point scored and star rating
+    function calculateReward(uint8 __pointsScored, uint8 __starRating) internal pure returns(uint8, uint8) {
+        if (__pointsScored < 10 ) {
+            return (__pointsScored, __starRating);
+        }
+        uint8 __pointremained = __pointsScored % uint8(15);
+        if (__starRating < 5) {
+            uint8 currentStarRating = __starRating + uint8(1);
+            return (__pointremained, currentStarRating);
+        }
+        return (__pointremained, __starRating);
+    }
+}