Recipe:

Cast on 3

Knit 3 (turn)

Knit 1, Yarn Over, Knit 1, Yarn Over, Knit 1 (turn)

Knit 5 (turn)

Knit 1, Yarn Over, Knit 3, Yarn Over, Knit 1 (turn)

Knit 7 (turn)

Knit 1, YO, Knit 5, YO, Knit 1 (turn)

Repeat until triangle you have made is ~10 inches long
Doesn’t need to be perfect.

For tutorials: https://www.purlsoho.com/create/knit-stitch/