It would be better if you remove the curtains and other things which hinder.
Bryan’s wife did this entire project by herself. First she decide on a pattern. Bryan made this pattern in Photoshop and created a stencil on cardboard. The most difficult job was tracing and cutting.
What they need from?
1) A spray bottle full of water and one drop of dish soap
2) A small squeegee
3) Paper towels
4) Ruler
5) Boxcutter or exacto knife
6) And more patience…