I'm trying to make a block/entity that when you meet the requirements, will float up and start spinning extremely fast. I have tried looking at the ender crystal code, but I have no idea where to start from.

Use (if) statements to determine what you want the requirement to be.

 

> Spawn an entity, with the texture of the block to do the render the spinning animation from (EntityEnderCrystal / RenderEnderCrystal)

> Use coding from an object that can move with angles (aka render class) to move it up to your desinated location.

Hi

 

A TileEntity will probably do what you need (with a TileEntitySpecialRenderer), alternatively an Entity spawned by your block as BrighamX suggested.

 

These are both fairly advanced so if you're just a beginner you might find it easier to start with something a bit simpler first.

 

Some vanilla examples are TileEntitySign (with TileEntitySignRenderer) for the TileEntity approach,  and EntityHanging (for Picture frames, item frames) for the Entity approach.

 

-TGG