The Bread Maker's Croissant

This is a recipe from the Bread Maker - the bakery I worked in a little while ago. The ingredients are as follows:
1) 900 g Strong Flour
2) 30g yeast (wet)
3) 60 g sugar
4) 600g water
5) 2 blocks of butter

This is my first attempt and I used 2 tea spoons of dried yeast instead, seemed to work ok. I made the dough the night before and put it in the fridge, rolled it out the next morning. They were very popular with people even after they've seen the amount of butter I used...