I constructed my grid using a table in html. Whenever I press a button, I call the table, along with the position and use the style.backgroundColor in JS to change the cell color. I used this as a reference: http://stackoverflow.com/questions/11517150/how-to-change-background-color-of-cell-in-table-using-java-script . The replies show the command being used. This is a list of colors you can use https://www.w3schools.com/colors/colors_names.asp Hope this helps!