Make things using lines that glow! To make a line, click anywhere, and a line from the white dot will extend to your mouse-pointer. You can keep adding lines to it. To move the white dot (starting location of lines), click and hold the mouse until the white dot moves to your mouse-pointer. Click to place it wherever you want your next lines to start. Change the color using the slider. Press Space to hide and show the slider. To save, press S and triple-click the code. Note: If your code exceeds 500 characters, it will give you a message, and it may be difficult to paste it in the comments due to the 500-character limit. Click in the area underneath the save code box to exit. To load, press L and paste in a save code.
Share your save codes in the comments! I give credit to Yoshi the Super Mario dinosaur for no reason. (i don't know who to give credit to, i did this all myself)