I've finally made a painting project! You can change the colours and pen size using the sliders. The pen colour slider acts a bit like the slider in the paint a sprite option. The two ends are red, and then it progresses from there. the screenshot option lets you take a screenshot without the sliders and buttons cluttering it. Press space when you're done with your screenshot. You might have to press hard if the lines you draw aren't drawing properly. Love and favourite! mew mew!
I used the base code from a video by SammyCheez, called 'How To Make A Drawing Game In Scratch 3.0!' I changed it around and added the screenshot button and the colour slider. Meow!