Knitting a Deacrease swatch

Since I’m getting better at my knitting, I am interested in knowing how different decreases work . I want to knit a swatch that would have all the different types of decreases that I am familiar with such as; SSK, K2TOG but I don’t know how to.

You can take a look at the swatch on the decreases page. Cast on about 20-30 sts, knit a few rows of garter, then switch to stockinette with a garter border. Start with the first one shown, make it inside the border. Do it on the RS rows a couple times, then move on to the next one. You can do some increases between so you don’t get down to too few sts.