The pattern includes:
both written & diagram (chart) form
both UK & US terminology

This is an easy pattern so even beginners can have a go. Gauge isn’t important, neither is your choice of yarn; just use an appropriate hook for your chosen ply.

Use up your scrap yarn stash, change colours as you like, work with variegated yarns. The choice is endless

This is begins in a corner & worked diagonally, increasing on each row until your desired size, then decreased down to the opposite corner; therefore you are able to make your rug (afghan) any size you want: from a small cot blanket to a bedspread.

Just be aware that you’ll need to divide your yarn in half; one half for the increase & the other half for decrease. And, if you plan a border, you will require additional yarn for that; I personally don’t think this rug (afghan) needs a border but of course, it’s up to you, this is your project have fun with it.