Ok Debbie with Bugjuiced was right, it is lot of work but sure worth it. She found this card in the Cardmaker Magazine. Debbie was a Guest Designer on Creative Time For Me and posted a Tip of the day!
I always like a Challenge so I took her pattern and tried to make sense of it. Took a while and a few tries but I think I got it.
It is all in the measuring. I cut 2 of the pattern above in black and then I cut 2 in the designer paper and cut those to fit in the panels. When cutting the designer paper cut them back to back so the design is on the right side.