Using the slider, you can change the color. You can also use the up and down arrow keys. After the color has been selected, click on any of the squares to switch the color of it. Hover your mouse over a square and press space to set your color to the square's color. Hover your mouse over a square and press the right or left arrow to change the square's color by one (if right arrow key pressed) or negative one (if left arrow key pressed). Key Colors*: 1: Red 3: Orange 4: Yellow 7: Green 10: Light Blue (Azure, perhaps) 13: Indigo* 15: Purple 17: [I don't know what this color is called] 20: white 30: black 21-29: various shades of gray *names are only estimates and names of colors do not seem to be standardized so some names may be incorrect. Press Z to hide the color slider. Click the green flag to clear. You can NOT save your art. 6/21/2021 update: I suppose that if you wanted to remix this you could try to "label" each square by its coordinates if you want to make it where you can save your art (e.g. the top left square could be labeled 0101, the top right square could be labeled *currently counting: 1, 2, 3, 4, ... 13, 14, 15* 1501, the bottom left square could be labeled *counts again with the result of fifteen* 0115, the bottom right square could be labeled 1515, and then if you understand what I'm saying, you could label the rest of the squares). However all that isn't worth my while.
All code and art made by me. 6/21/2021 update: It would seem on my computer that full screen glitches the squares. Interesting... I'm not sure what the best approach to fixing that is... But in any case I'm not messin' with it.