Non-Fungible Tokens (NFTs) are unique digital assets stored on a blockchain, representing items like digital art or collectibles, and they differ from fungible tokens by their singularity. This tutorial guides users through the process of creating an NFT collection and deploying it to the OpenSea marketplace, using emojis with random background colors generated by Chainlink VRF. The tutorial involves cloning a specific repository, setting up the development environment, and writing a smart contract with Solidity that stores metadata on-chain. It explains the utilization of Chainlink VRF for generating randomness, the creation of on-chain SVG images, and the encoding of metadata for compatibility with NFT marketplaces. Additionally, users learn to deploy the smart contract and mint NFTs on the Ethereum Rinkeby testnet, with the potential to trade them on OpenSea, all while understanding the technical nuances of on-chain versus off-chain metadata storage and the use of Chainlink's updated VRF v2 for randomness.