Hi and welcome!
1 st twice every 2 rows, 1 st once every 4 rows,
*1 st once every 2 rows, 1 st once every 4 rows *,decrease 8 times from * to *.
You’re on the right track. Yes decrease 1 stitch every second row, twice then 1 stitch on the following 4th row.
Now, for the part between the asterisks, decrease 1 stitch on the following second row, one stitch on the following 4th and repeat this a total of 8 times.
Your pattern may then give a stitch count and you can check to make sure you’ve done the repeat between the asterisks enough times.