what you are looking for is this:
1. Photoshop transform --> skew
Adobe Photoshop CS5 * Transform freely
2. To save a file whit transparency save it as .PNG "Most used file format that support transparency"
Saving a File with Transparent Background | Photoshop Basics
Adobe Photoshop CS5 * Save a file in PNG format
Yep, what $1r_M4x1mu$ said.
your red/Black overlap is not straight/square/in-line... was this intentional?
use the transform to to angle the glass effect layer and angle it the same as rest of image
Success is a work in progress,never stop trying.
I have another question and that is.. :now i made a good left and right side different coloured and i skewed it like i want it but what IF i want to make a diagonal different coloured sides??????
Like on next image:
I didn't know how to make a diagonal side but i just used the pen tool to create it.
So do you understand what i mean?
So i want to make the left side white and the other side of the diagonal i want to make black?
you are in the right path
Pen Tool, Shapes & Custom shapes
this guide will help you whit the pen tool. By the way pen tool is a powerful tool very useful.
Photoshop Pen Tool Guide | Tutorial9
And for the shapes overlapping, overlaying, make sure to put each shape in separate layes so you can work independently in between shapes "color,gradients, and pattern fills"
Also a reminder on working whit layers
Working with Layers in Photoshop | Tutorial9
Good luck and have fun.