These 2 firebreather must destroy the 3 purple fruit blocks.
Make this firebreather fall down. He will shoot the green fruit and the 2 firebreathers will fall down.
This pattern showns the yellow fruit blocks that should remain,
before the 2 firebreathers are released.
One firebreather is used to destroy the two purple fruit blocks blocking the blue cauldron.
Get the blue color before the firebreather is destroying the cauldron, too !