Two years ago I made this calculator which has animated buttons using your mouse or keyboard. Today I decided to add the Copy and Paste buttons to it. Before you could click your number or do Ctrl-C to copy it in the clipboard but I never added a way to paste a clipboard number into your screen until today. You can copy from any program and paste it to the calculator, or copy from the calculator and paste it to itself. Tell me what you think, thanks.
(Code deleted with an update below.)