The square in the larger blue blocks.
Block 2 - 11 min
Block 3 - 12 min
Block 4 - 15 min
Now I need to decide how to fill the 3.25 inches that are in the four blocks... I plan on using concentric squares as Leah did in her model Rainbow Log Cabin, it's just do I make them all the same? and how much space in between the lines?