# Using Remix
## Overview
This tutorial will show you how to compile and deploy an existing smart contract using Remix.
Remix IDE is a no-setup smart contract development tool with a GUI. Beginners and experts alike will benefit from Remix. Remix plays well with other tools, and allows for a simple deployment process to the chain of your choice. The Remix Project also can serve as a learning lab for teaching and experimenting with EVM-compatible chains.
## Pre-requisites
* Install Metamask
* Configure KuCoin Community Chain Testnet on Metamask
* Get Testnet token
## What you will do
* Create a file on Remix
* Upload or code the smart contract to the IDE
* Compile the smart contract
* Connect the application to KCC Testnet via Metamask
* Deploy the smart contract
## Getting started with [Remix IDE](https://remix.ethereum.org/)
To start building a smart contract, click on **New File** and name it as `HelloWorld.sol`.
## Writing smart contract
Copy the code given below to `HelloWorld.sol` file
```solidity
// SPDX-License-Identifier: MIT
// Specifies that the source code is for a version
// of Solidity greater than 0.8.15
pragma solidity ^0.8.15;
contract HelloWorld {
// A publicly accessible function that takes a string as a parameter
// and echoes the `message`
function echo(string memory message) public pure returns (string memory) {
return message;
}
}
```
The first line, `pragma solidity ^0.8.15` specifies that the source code is for a Solidity version greater than 0.8.15. [Pragmas](https://solidity.readthedocs.io/en/latest/layout-of-source-files.html#pragma) are common instructions for compilers about how to treat the source code (e.g., pragma once).
## Compile smart contract
* Switch to the **Compiler** tab
* Select compiler version **0.8.15**
* Now, compile `HelloWorld.sol`
* After successful compilation, it will show a green tick mark on the **Compiler** tab button
## Configure KCC Testnet on Metamask
{% content-ref url="../../individuals/network-configuration" %}
[network-configuration](https://docs.kcc.io/individuals/network-configuration)
{% endcontent-ref %}
## Deploy Smart Contract to KCC Testnet
In both Testnet and Mainnet, you do the below to deploy your smart contract using Remix.
* Navigate to the **Deployment tab**
* Select **Injected Provider** Metamask in the **Environment** dropdown, and your contract
* Accept the Connect request received in MetaMask. You can also manually launch MetaMask if the popup doesn't open by default
* In MetaMask, once a transaction is deployed, you will receive another MetaMask pop-up that requires you to confirm the transaction. You just need to confirm the transaction
**Congratulations! You have successfully deployed the** [`HelloWorld`](https://scan-testnet.kcc.network/tx/0xfac405bc36a1e4230b5e6e7616877e48c81ee8d73b95a6d54d8aa7c9aa80b90f) **Smart Contract** to the **KuCoin Community Chain Testnet**. You can start interacting with your Smart Contract. Check the deployment status at
