press S to start. hold space to draw or hold your mouse button (left click). press the color you want to choose. press the add or the minus button to add or minus the thickness. press the eraser button and hold space or hold your mouse button (left click)to erase. press the erase all button to erase all the things you've drawn.
thanks to @funut on youtube. sorry this won't save any of the things you've drew so just take a picture of it. Have fun drawing!! UPDATEEEEEE added better visualization pen size limit
