pragma solidity ^0.4.16;

/**

 * Math operations with safety checks

 */

contract BaseSafeMath {


    /*
    standard uint256 functions
     */



    function add(uint256 a, uint256 b) internal 

    returns (uint256) {

        uint256 c = a + b;

        assert(c >= a);

        return c;

    }


    function sub(uint256 a, uint256 b) internal 

    returns (uint256) {

        assert(b <= a);

        return a - b;

    }


    function mul(uint256 a, uint256 b) internal 

    returns (uint256) {

        uint256 c = a * b;

        assert(a == 0 || c / a == b);

        return c;

    }


    function div(uint256 a, uint256 b) internal 

    returns (uint256) {

	    assert( b > 0 );
		
        uint256 c = a / b;

        return c;

    }


    function min(uint256 x, uint256 y) internal 

    returns (uint256 z) {

        return x <= y ? x : y;

    }


    function max(uint256 x, uint256 y) internal 

    returns (uint256 z) {

        return x >= y ? x : y;

    }



    /*

    uint128 functions

     */



    function madd(uint128 a, uint128 b) internal 

    returns (uint128) {

        uint128 c = a + b;

        assert(c >= a);

        return c;

    }


    function msub(uint128 a, uint128 b) internal 

    returns (uint128) {

        assert(b <= a);

        return a - b;

    }


    function mmul(uint128 a, uint128 b) internal 

    returns (uint128) {

        uint128 c = a * b;

        assert(a == 0 || c / a == b);

        return c;

    }


    function mdiv(uint128 a, uint128 b) internal 

    returns (uint128) {

	    assert( b > 0 );
	
        uint128 c = a / b;

        return c;

    }


    function mmin(uint128 x, uint128 y) internal 

    returns (uint128 z) {

        return x <= y ? x : y;

    }


    function mmax(uint128 x, uint128 y) internal 

    returns (uint128 z) {

        return x >= y ? x : y;

    }



    /*

    uint64 functions

     */



    function miadd(uint64 a, uint64 b) internal 

    returns (uint64) {

        uint64 c = a + b;

        assert(c >= a);

        return c;

    }


    function misub(uint64 a, uint64 b) internal 

    returns (uint64) {

        assert(b <= a);

        return a - b;

    }


    function mimul(uint64 a, uint64 b) internal 

    returns (uint64) {

        uint64 c = a * b;

        assert(a == 0 || c / a == b);

        return c;

    }


    function midiv(uint64 a, uint64 b) internal 

    returns (uint64) {

	    assert( b > 0 );
	
        uint64 c = a / b;

        return c;

    }


    function mimin(uint64 x, uint64 y) internal 

    returns (uint64 z) {

        return x <= y ? x : y;

    }


    function mimax(uint64 x, uint64 y) internal 

    returns (uint64 z) {

        return x >= y ? x : y;

    }


}


// Abstract contract for the full ERC 20 Token standard

// https://github.com/ethereum/EIPs/issues/20



contract BaseERC20 {

    // Public variables of the token
    string public name;
    string public symbol;
    uint8 public decimals;
    // 18 decimals is the strongly suggested default, avoid changing it
    uint256 public totalSupply;

    // This creates an array with all balances
    mapping(address => uint256) public balanceOf;
    mapping(address => mapping(address => uint256)) public allowed;

    // This generates a public event on the blockchain that will notify clients
    event Transfer(address indexed from, address indexed to, uint256 value);
	
    event Approval(address indexed _owner, address indexed _spender, uint256 _value);

    /**
     * Internal transfer, only can be called by this contract
     */
    function _transfer(address _from, address _to, uint _value) internal;

    /**
     * Transfer tokens
     *
     * Send `_value` tokens to `_to` from your account
     *
     * @param _to The address of the recipient
     * @param _value the amount to send
     */
    function transfer(address _to, uint256 _value) public returns (bool success);
    /**
     * Transfer tokens from other address
     *
     * Send `_value` tokens to `_to` on behalf of `_from`
     *
     * @param _from The address of the sender
     * @param _to The address of the recipient
     * @param _value the amount to send
     */
    function transferFrom(address _from, address _to, uint256 _value) public returns (bool success);

    /**
     * Set allowance for other address
     *
     * Allows `_spender` to spend no more than `_value` tokens on your behalf
     *
     * @param _spender The address authorized to spend
     * @param _value the max amount they can spend
     */
    function approve(address _spender, uint256 _value) public returns (bool success);
}


/**

 * @title Standard ERC20 token

 *

 * @dev Implementation of the basic standard token.

 * @dev https://github.com/ethereum/EIPs/issues/20

 * @dev Based on code by FirstBlood: https://github.com/Firstbloodio/token/blob/master/smart_contract/FirstBloodToken.sol

 */

contract LightCoinToken is BaseERC20, BaseSafeMath {

    //The solidity created time
	address public owner;
	address public lockOwner;
	uint256 public lockAmount ;
	uint256 public startTime ;
    function LightCoinToken() public {
		owner = 0x9a64fE62837d8E2C0Bd0C2a96bbDdEA609Ab2F19;
		lockOwner = 0x821C05372425709a68090A17075A855dd20371c7;
		startTime = 1515686400;
        name = "Lightcoin";
        symbol = "Light";
        decimals = 8;
        totalSupply = 21000000000000000000;
		balanceOf[owner] = totalSupply * 90 /100 ;
		balanceOf[0x47388Cb39BE5E8e3049A1E357B03431F70f8af12]=2000000;
		lockAmount = totalSupply / 10 ;
    }

	/// @param _owner The address from which the balance will be retrieved
    /// @return The balance
    function getBalanceOf(address _owner) public constant returns (uint256 balance) {
		 return balanceOf[_owner];
	}
	
    function _transfer(address _from, address _to, uint256 _value) internal {
        // Prevent transfer to 0x0 address. Use burn() instead
        require(_to != 0x0);

        // Save this for an assertion in the future
        uint previousBalances = add(balanceOf[_from], balanceOf[_to]);
		
        // Subtract from the sender
        balanceOf[_from] = sub(balanceOf[_from], _value);
        // Add the same to the recipient
        balanceOf[_to] = add(balanceOf[_to], _value);
		
		// Asserts are used to use static analysis to find bugs in your code. They should never fail
        assert(add(balanceOf[_from], balanceOf[_to]) == previousBalances);
		
        Transfer(_from, _to, _value);

    }

    function transfer(address _to, uint256 _value) public returns (bool success)  {
        _transfer(msg.sender, _to, _value);
		return true;
    }

    function transferFrom(address _from, address _to, uint256 _value) public returns (bool success) {
        // Check allowance
        allowed[_from][msg.sender] = sub(allowed[_from][msg.sender], _value);
		
        _transfer(_from, _to, _value);
        return true;
    }

    function approve(address _spender, uint256 _value) public
    returns (bool success) {
        allowed[msg.sender][_spender] = _value;
		
	    Approval(msg.sender, _spender, _value);
        return true;
    }

    /// @param _owner The address of the account owning tokens
    /// @param _spender The address of the account able to transfer the tokens
    /// @return Amount of remaining tokens allowed to spent
    function allowance(address _owner, address _spender) public constant returns (uint256 remaining) {
        return allowed[_owner][_spender];
	}
	
	function releaseToken() public{
	   require(now >= startTime + 2 * 365 * 86400 );	   
       uint256 i = ((now  - startTime - 2 * 365 * 86400) / (0.5 * 365 * 86400));
	   uint256  releasevalue = totalSupply /40 ;
	   require(lockAmount > (4 - i - 1) * releasevalue); 	   
	   lockAmount -= releasevalue ;
	   balanceOf[lockOwner] +=  releasevalue ;
    }
}