godot/editor/icons/Play.svg

<svg xmlns="http://www.w3.org/2000/svg" width="16" height="16"><path fill="#e0e0e0" d="M4 12a1 1 0 0 0 1.555.832l6-4a1 1 0 0 0 0-1.664l-6-4A1 1 0 0 0 4 4z"/></svg>