USE TURBO MODE! Shift click the green flag. Use the w and s keys to zoom in and out respectively. Use the arrow keys to move around. You have to click the keys in order to move. This is how it had to be done, otherwise it would lag a lot. The mandelbrot set is created by continuously squaring numbers on the imaginary plane, though some sections have been optimized to just be colored black. When the number jets off to infinity, it is not contained, otherwise it is.