Think about it, the regular PC has them, do they not? Take a look at a picture on google and look at the floor. The only difference between theirs and mine, is that I have two small squares diagonally and the regular ones have four small squares with just a lighter color.
Ah Banjora,or Alex as I like to call him,I see why it took you 7 hours,but then again it's all worth it when using paint but there are other programs to speed up the process.