Tools/items required for completing this project: Carpet samples, 1 roll of heavy-duty strength duct tape, utility knife and extra blades, mat cutting board, sharpie marker, "L" shaped ruler/square, scissors.
Step 1: Make a few phone calls to your local carpet stores and find out if they sell carpet samples, carpet squares, or "retired" demo carpets. Many places do have them and sell them around $1 each.
Step 2: Calculate the size of rug you want to make. For my project we measured the size of our dining room table with the dimensions including people seated around the table. (This way the chairs will still be on the carpet when they are pulled out.)
Step 5: Arrange all the samples on the floor. Try a few different versions to figure out which way you like it best. An easy way to pick which way you like it best is to take a picture of it after each arrangement and then view them on your computer side by side for comparison.
Step 6: Once you've gotten your perfect arrangement, you'll need to flip them over IN ORDER. (When the top right square is flipped over, it should be in the top left position facing down.)
Step 9: Duct tape the outer edges from one corner to the next. Be sure just to tape to the edge of the backing; if you leave any tape hanging over the edge, you'll have the sticky side on your feet when you flip it over!
Step 10: Walk on the duct tape to make sure it's squished all the way down for proper adhesion. Sweep, vacuum or pick up all the crumblies stuck to the back side.
Step 11: Ready, set, FLIP!
Step 12: Trim off any excess fuzzies around the edges and where 2 pieces meet, along with any plastic backing material that didn't cut nicely in step 4.