Cushion cover using cathedral window quilting method - 1

Hi friends, I have seen a video on how to stitch a cathedral window quilt. I have used three different clothes to stitch this cushion cover one is printed and the other two are plain.

First place the red coloured cloth in a triangular shape along the Centre.

Then place the four clothes with the red cloth in the middle and stitch along the side. 

Stitch one more piece like this and keep one on top of the other, right side facing each other and stitch along the side. 

Keep the black cloth on top and use a safety pin to avoid the movement of the black piece. 

Now pull the red cloth towards the Centre and stitch along the edges. 

https://m.youtube.com/watch?v=akKU0zg-qaw

Please watch this link to get a better idea.