This is a little how-to guide to prove that making a platform isn’t rocket surgery.
Start by gathering your supplies. You’ll need enough mats to fit your design. In this case, I wanted to make a smaller square platform, so I only needed one mat. I use a decent pair of scissors to cut my mat(s) but a utility knife will work. You’ll need something to measure with, like a tape measure or yardstick, and a permanent marker (Sharpie) or pen to mark your mats at your measurement points. To hold the platform together, I just use Duck tape.