Move your mouse around and experiment with the sliders.
Tutorial from @MathMathMath, thank you! Find it here: https://scratch.mit.edu/projects/406896730/ I modified it the slightest bit to go to your mouse pointer and to change color :D Tip: the lower the value of the Cube Distance, the bigger/closer the cube is. The opposite is true with the focal point. Wierd easter egg: If you set the Cube Distance to -[x] , then set the focal length to something close to or exactly [x], it will create a wierd effect. another wierd easter egg: drag the variables all the way down and it will go to the opposite of your pointer.