This is a map called "Effectiveness". There are 10 different colored blocks that represents a specific effect. You can see them when you download the map. Be sure to avoid the red ones in this map, jump with the orange blocks, finish the level with the yellow blocks, activate redstone with lime blocks, get dizzy with green blocks, move fast with sky blue blocks, go down with purple, go up with pink blocks, get withered with gray blocks and see nothing with black blocks. Please play this map in Minecraft 1.5.2. (Because I created this map in 1.5.2.)