doouble tall block

I have an example from a mod I have been tinkering with the last few weeks:

I have two seperate blocks for the top half and bottom half, and this procedure is tiggered by the "On block added" of the bottom half block. This also takes the block direction into account.

My bad - "When block is placed by" should be the correct trigger.

what if i were to make an 2 wide block, that works with rotation??

Thank you for the help! I needed help on a mod of mine and it really helped! Thank you again!

Greetings! I'm trying to make a decorative lamp two blocks high. I would like it to break both blocks when any of the blocks are broken. I don't know programming, but I'm trying this code that Octave_ posted, but it won't let me use it in the trigger, and it tells me that it requires dependencies, but I don't know how to fix it. The dependencies it asks for are Entity, x, y, z, and World. 
 

This is the code, I hope you can help me.

package net.mcreator.multiblock.procedures;

/* imports omitted */

public class MultiBlockAlSerColocadoElBloqueProcedure {
	public static void execute(LevelAccessor world, double x, double y, double z, Entity entity) {
		if (entity == null)
			return;
		if ((world.getBlockState(BlockPos.containing(x, y + 1, z))).getBlock() == Blocks.AIR) {
			world.setBlock(BlockPos.containing(x, y + 1, z), MultiblockModBlocks.TOP_BLOCK.get().defaultBlockState(), 3);
			{
				Direction _dir = (new Object() {
					public Direction getDirection(BlockPos pos) {
						BlockState _bs = world.getBlockState(pos);
						Property<?> property = _bs.getBlock().getStateDefinition().getProperty("facing");
						if (property != null && _bs.getValue(property) instanceof Direction _dir)
							return _dir;
						else if (_bs.hasProperty(BlockStateProperties.AXIS))
							return Direction.fromAxisAndDirection(_bs.getValue(BlockStateProperties.AXIS), Direction.AxisDirection.POSITIVE);
						else if (_bs.hasProperty(BlockStateProperties.HORIZONTAL_AXIS))
							return Direction.fromAxisAndDirection(_bs.getValue(BlockStateProperties.HORIZONTAL_AXIS), Direction.AxisDirection.POSITIVE);
						return Direction.NORTH;
					}
				}.getDirection(BlockPos.containing(x, y, z)));
				BlockPos _pos = BlockPos.containing(x, y + 1, z);
				BlockState _bs = world.getBlockState(_pos);
				Property<?> _property = _bs.getBlock().getStateDefinition().getProperty("facing");
				if (_property instanceof DirectionProperty _dp && _dp.getPossibleValues().contains(_dir)) {
					world.setBlock(_pos, _bs.setValue(_dp, _dir), 3);
				} else {
					_property = _bs.getBlock().getStateDefinition().getProperty("axis");
					if (_property instanceof EnumProperty _ap && _ap.getPossibleValues().contains(_dir.getAxis()))
						world.setBlock(_pos, _bs.setValue(_ap, _dir.getAxis()), 3);
				}
			}
		} else {
			if (entity instanceof Player _player) {
				ItemStack _setstack = new ItemStack(MultiblockModBlocks.MULTI_BLOCK.get()).copy();
				_setstack.setCount(1);
				ItemHandlerHelper.giveItemToPlayer(_player, _setstack);
			}
			world.setBlock(BlockPos.containing(x, y, z), Blocks.AIR.defaultBlockState(), 3);
		}
	}
}