Not every question has to be as hard as possible, here is an easy one. I joined my kids playing with duplo, and found out that the duplo 9 and 6 look exactly the same if you turn one of them 180 degrees. So I decided to build the structure below. Of course I didn't use any glue or tape. Could yo...

Below is a small sequence, showing every element, except the first. What is the image it all started with? text version: ,g, , , ,g, , ,r,r,r, , , ,g,g,g, , ,r, , , ,r, ,g,r,r,r,g, , ,g,g,g, , ,r, , , ,r, ,g,r,r, ,g, , ,g,g, ,r, , , , , , , ,r, , , , , ,g,r,r,r,g, , , , , , , , ,g,g,g, , ,r, ,...