wave crochet trimming No 3

Pattern : We start making the firs line wich contains 2 chains -1sc  the fabric will do trimming.
1 row - we begin the first row by 3 chain - 3 dc (double crochet),* 2 chain , overtake one position and the next we 4dc *....repeat the process until the end of  the series.
2 row - 3 chain * 4-3-4 dc shell ( 4 double crochet - 3 chain - 4 double crochet shell)*....repeat the process until the end of the series.
3 row - we start with 3 chain ,*1 dc -  1ch( 4 times) over the past , 1dc -ch( 4 times) the chain of previous group (4-3-4 dc shell). 1 dc -  1ch( 4 times) *......repeat the process until the end of the series.
4 row - change the color and start making 3 chain - 1sc in each chain intermediates dc the previous row
For hanging ,watch the video carefully where  you have to do .