crochet stitch Part 1(the opening of the trangle )

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Pattern for this project:
1 row - start with 4 chain & the first 7 double crochet in the stitch (8 in total)
2 row - change the color and work all the row 8 dc (double crochet)
3 row - changhe the color and start with 3 chain ,7 dc in the st (7 double crochet in the stitch) ,skip 8 dc and 8 double crochet in the 1 stitch.
4 row - change the color 3ch and all the row double crochet.
5 row - change the color and start with 3 chain, 7 dc in the st,8dc in the 1stitch,8 dc in the 1 stitch,
6 row - change the color 3 ch and dc in all the row.
7 row - change the color and start with 3 ch, 7 dc in the 1stitch, 8 dc in the 1 st, 8dc in the 1 st , 8dc in the 1 st .
8 row - change the color 3ch and all the row double crochet.
9 row - change the color , 3 ch 7 dc in the 1 st, *8 dc in the 1 stitch*repeat this until another 3 times ( 5 for all the row ).
10 row - change the color 3ch and all the row double crochet.
11 row - change the color , 3 ch 7 dc in the 1 st, *8 dc in the 1 stitch*repeat this until another 5 times ( 7 for all the row ).
 for the second part of the video see here