For my sketches on Processing i retrieved some examples from processing.js/learning but customised and tweaked them to my liking. The first sketch is a polygon that follows the cursor on the screen and seems gelatinous when it moves. I changed the numbers of sides from 5 to 4 making it a square and changing the background and object colour using the RGB method.
The second sketch is a simpler effect where there is a circular pattern that surrounds the cursor whenever it goes across the screen. I changes the colour of the circles and the size of the circles that are in the effects that surround the cursor. I have commented on where i have made changes on the processing scripts.