Update README.md

Signed-off-by: Brainy7980 <bpurdy12@icloud.com>

Author: Brainy0789

README.md

@@ -14,3 +14,120 @@ Secondly, download the source code from here.
 Now, finally, run the `setup.py` file inside of Python. It will ask for things and then you can use the `bsc` command to compile BScript files! Neat!
 
 Or, just download the GUI app if you prefer. It's completely self-contained and required no dependencies.
+
+## Requirements
+
+## SDL2
+
+To compile programs that use the `window;` command in BScript, you need SDL2 installed.
+
+<details>
+<summary><strong>Windows</strong></summary>
+
+Using MSYS2:
+
+```bash
+pacman -S mingw-w64-x86_64-SDL2
+```
+
+Make sure you're using the **MSYS2 MinGW 64-bit** terminal, and that `C:\msys64\mingw64\bin` is in your PATH.
+
+</details>
+
+<details>
+<summary><strong>macOS</strong></summary>
+
+Install Homebrew if you haven't already:
+
+```bash
+/bin/bash -c "$(curl -fsSL https://raw.githubusercontent.com/Homebrew/install/HEAD/install.sh)"
+```
+
+Then install SDL2 via Homebrew:
+
+```bash
+brew install sdl2
+```
+
+</details>
+
+<details>
+<summary><strong>Linux (Debian/Ubuntu)</strong></summary>
+
+```bash
+sudo apt update
+sudo apt install libsdl2-dev
+```
+
+</details>
+
+<details>
+<summary><strong>Linux (Fedora/RHEL)</strong></summary>
+
+```bash
+sudo dnf install SDL2-devel
+```
+
+</details>
+
+
+### GCC Compiler
+
+BScript uses **GCC** (or compatible C compiler) to compile transpiled code. Please ensure it's installed on your system.
+
+<details>
+<summary><strong>macOS</strong></summary>
+
+- Install **Xcode Command Line Tools**:
+  
+```bash
+xcode-select --install
+```
+
+- This will give you `gcc` (which points to Clang, and works fine for most C programs).
+</details>
+
+<details>
+<summary><strong>Linux (Debian/Ubuntu/Fedora/Arch)</strong></summary>
+
+- On Debian/Ubuntu:
+
+```bash
+sudo apt update
+sudo apt install build-essential
+```
+
+- On Fedora:
+
+```bash
+sudo dnf groupinstall "Development Tools"
+```
+
+- On Arch Linux:
+
+```bash
+sudo pacman -S base-devel
+```
+
+</details>
+
+<details>
+<summary><strong>Windows</strong></summary>
+
+#### Option 1: MSYS2 (Recommended)
+1. Download and install: [https://www.msys2.org](https://www.msys2.org)
+2. Open the **MSYS2 MinGW 64-bit** terminal.
+3. Run:
+
+```bash
+pacman -S mingw-w64-x86_64-gcc
+```
+
+> Make sure to add `C:\msys64\mingw64\bin` to your system PATH.
+
+#### Option 2: MinGW (Standalone)
+1. Download from: [https://osdn.net/projects/mingw/releases/](https://osdn.net/projects/mingw/releases/)
+2. Select the `mingw32-gcc-g++` package in the installer.
+3. Add `C:\MinGW\bin` to your PATH environment variable.
+
+</details>