The RandomEmitter.sol contract uses Chainlink VRF to request and receive provably random numbers.
The deploy.js script is a deployment script. The fund.js script funds the deployed RandomEmitter.sol contract with LINK tokens to pay the fees for random number requests. The random.js script requests a new random number from the Chainlink VRF system.
RandomEmitter.sol rinkeby address -- 0x21e232d1fA22048c3015826d00d1c252599Bd9eb