How do I move that blue thing to it's place

Hello,

I try to get a feeling if Unity is for me.
So I did the getting started course but im stuck at the building your mural part
So far I have this:

It seems I cannot move the blue part to its new place so I can make the cat,
Anyone who have some hints ?

OK so what is half hidden are the arrows a lot of people use to move things. they arent hidden hidden they just kinda merge with the colours on screen… the only obvious one is the green one… so, click on the green arrow and pull it in that direction too much then the others will be more visible on the white background and adjust to taste