This is a quick pen demonstration. Click to draw. R - Hide or show variables. T - Pen down/up E - Clear all. Right and left arrows - Change the color of the pen. Change Size variable to change the size of the pen. Change Symmetry variable to change numbers of pen. 1 = 1 pen - 2 = 2 pens - 4 = 4 pens. It's easy to understand, isn't it ? Up and down arrow to raise and lower the sound.
Idea found here : https://scratch.mit.edu/projects/212258294/ I add some options and I optimized everything. Music : I don't know who made it but it's called Sleep Away. Found here : https://scratch.mit.edu/projects/119627361/#player v1.2 - 15/01/19 - Scratch 3.0 check and new thumbnail. v1.1 - 19/12/18 - Maximum size is 10. Rapid multicolor added, changed thumbnail. v1.0 - 13/06/18 - blue and purple color added, changed thumbnail, added a pen down/up control v0.2 - 07/06/18 - brown color added, changed thumbnail, added a sound control v0.1 - 29/05/18 - release