Use the arrow keys to move the vaccine (red) square. Use W, A, S, and D to move the covid (blue) square. How the CPU works: It finds a random square that is not its colour. Then it moves to that square. If there are less than 50 grey squares left, it will only target grey squares.
I changed color to colour and gray to grey cuz i'm an Aussie Also thx to @CringeCreator21 because his election project lead me to color conflict.