This is 100% pen, so rest assured! To draw, press D, to 'lift' your pen, press U. Use the Arrow keys to control where you draw. ▶ will draw to the right, and ◀ will draw a line going left. Same with up and down. E to erase. To make diagonal line: Use ◀ or ▶ , then just use Up or Down arrow
Note, when you click the flag, it will move your dot (the sprite you draw with) to a certain place, drawing a line with it (if you kept your pen down the last time you used this project). If that happens, just press E. If you want to start drawing from another position, just make sure your pen is up and use the arrow keys to move. You can make a line thicker! To make a horizontal line thicker, just draw the line, press the down or up arrow key, and the draw it again. same for a vertical line, but instead of pressing up arrow after line is drawn, just use left or right. Creds and boring stuff: All code is by me, all software is from https://scratch.mit.edu. Link to my profile: https://scratch.mit.edu/users/cryptogram53/