PracticeCoin

Its a basic ERC20 where you can use the basic functions like crowdfunding.
It was made with solidity 0.4.9 but I migrated it to 0.4.24.

Tools

Ganache https://truffleframework.com/ganache
Metamask https://metamask.io/

Steps

λ npm install truffle@v4.1.14 -g
λ truffle version
Truffle v4.1.14 (core: 4.1.14)
Solidity v0.4.24 (solc-js)
λ git clone https://github.com/kennblvnp/PracticeCoin.git
λ cd PracticeCoin
λ truffle migrate --reset

Truffle Console

λ PracticeToken.deployed().then(function(instance){ tokenInstance=instance; })
λ tokenInstance.address
0x5313aeabd1ed00b7236b5a05a06ac5b6c417dbaa
λ tokenInstance.totalSupply().then(function(totalSupply){ practiceTokensupply=totalSupply; })

Right now this supply is only for free. If you transfer, there is no fee.
λ practiceTokensupply
BigNumber { s: 1, e: 6, c: [ 1000000 ] }

λ PracticeTokenSale.deployed().then(function(instance){ saleInstance=instance; })
λ saleInstance.address
0xcc75b1263e648148dd7d39fede9ba95e26049120

Transfer all practiceTokensupply to PracticeTokenSale
λ tokenInstance.transfer(saleInstance.address, practiceTokensupply, { from: web3.eth.accounts[0] })

Check the balance of PracticeToken, this should return 0
λ tokenInstance.balanceOf(tokenInstance.address)
BigNumber { s: 1, e: 0, c: [ 0 ] }

Check supply of PracticeToken, it should return 1000000 by now
λ tokenInstance.balanceOf(saleInstance.address)
BigNumber { s: 1, e: 0, c: [ 1000000 ] }

Doing this will deduct fees to the buyer
10000000000000000000 is the token price = 10 ethereum
λ saleInstance.buyTokens(5, { from: web3.eth.accounts[0], value: 5 * 10000000000000000000 })
Try it with another user
λ saleInstance.buyTokens(5, { from: web3.eth.accounts[1], value: 5 * 10000000000000000000 })

To check the balance of PracticeTokenSale

λ tokenInstance.balanceOf(saleInstance.address)

Where did the fee's go?

λ web3.eth.getBalance(saleInstance.address)
BigNumber { s: 1, e: 19, c: [ 500000 ] }

How to transfer all earned ethereum to the owner of the smart contract?

λ saleInstance.endSale()
Expect a lot of money in your account

Deploy

This is if you are already confident and familiar with solidity and truffle commands and if you are ready to deploy your contract in main net you might wanna use this standard ERC 20 and 721:
v2.0: https://github.com/OpenZeppelin/openzeppelin-solidity/releases/tag/v2.0.0
v1.12.0: https://github.com/OpenZeppelin/openzeppelin-solidity/releases/tag/v1.12.0

Latest and stable: https://github.com/OpenZeppelin/openzeppelin-solidity