You need to use a different kind of magic for the different colour of the gems
yellow=lightning blue=blizzard and red=fire but
You also need to make sure they are aligned at the time for example for the yellow switch
"lightning" you have to wait until they are in a cloumn shape as to get all of the with
"blizzard" you wait until they are in a straight line and for "fire" which in my opinion
Is the hardest you have to wait for it to surround you then use fire to catch them all
Hope this helped