Started on the middle part of a bedspread

My daughters birthday is coming up and I know she loves horses. Yesterday I found a pattern on a great horse picture. I thought I could make a middle part of this horse pattern and then crochet granny squares around it.

I´m following this pattern.




I found it on pinterest
http://se.pinterest.com/pin/2955555979981784/

Now to make this I started to chain 305 sts. Using hook 2mm. There is a 100 squares in the picture and I counted I as 3 to be able to make the pattern I´m doing. Then I crochet in the 5 ch from the hook 1 dc. And every part that is not back on pattern I make 2 ch and 1 dc. When I get to a part that´s black I make 2 dc within the space (2 ch). You can see on my picture of what I made so far. :)