Click on the flag to erase everything and reset the colour. When you click the mouse, something will be drawn on the screen. When you click the colour, the pen's colour will be changed. When you click Size+ and Size-, the pen's size will be changed. When you click the Eraser icon in the drawing area, you are indicating that things will be erased. When you click Erase All, everything will be erased.
Especially for @starboy00000 Note: press the green flag
