Blocking the Heat from a Window

I have two west facing windows. Needless to say, they get hot. I also have things in my window that shouldn't get hot but have no other place to put them. So today I spent $1.00 and 15 minutes on a fix that hopefully will help block out some of the sun.

I bought a foam board at the dollar store, cut it in half, and put it behind the tubs of supplies. I will wait a day to post this and make sure it helps. The white color is suppose to reflect the heat when you can't use foil.

I am sorry the images are so dark. I did the best I could do gauge the part of the day not too dark or too light.