First of all I made the backside of the necklace, which is nothing more than a short piece of chain, two rings at each end and a small chain lock in the middle.
Next, I choose some different colors of chain and cut the first one about 7 cm and every next one a cm longer.
Repeat step two, and attach the chains (short to long) to the small rings on both sides of the backside.
Now, gather all the ends with a piece of iron thread or anything similar. make sure the ends of the longest chains are on the outside, and the shortest in the middle.
Bend the piece of iron thread to a ring.
Curl both ends to small hooks, and attach them to each other.
Voila, your collar necklace is done! :)