Toronto Skyline illusion art
Using a ruler draw tall buildings with different line patterns (diagonal, horizontal, zig zag, wavy) on them using black and white. You can use pencil first and the use a black pencil crayon.
Then draw circles with different colours in pencil crayon in the background. And keep the pattern going until it blends into the background.
Use bright colours for the background and make sure the whole page is coloured!