An unfinished graphics and animation utility based on my Kandinsky engine. L for line, T for triangle, R for rectangle, O for orbit. Hold 1,2,3,4,5 and/or 6 for different parameters and use arrow keys (while still holding) to adjust these parameters. You can hold and adjust multiple parameters simultaneously. Press Q to open a window and input a hex code for a different colour. Press space to save the shape to your frame.
Even though there's an option to save a shape to the frame, there is no code to read the frame and restore all the shapes. It is possible, but I didn't do it. There are also no animation tools currently available (I don't think there's even an option to add a new frame). If you can finish this project, you are a hero of Scratch, surely.