tileEntityClass

public class MultiBlockBase extends TileEntity implements ITickable {

    boolean isComplete = false;

    public void onBlockAdded() {

        int counter = 0;
        int safetyCounter = 0;

        int minX = -1;
        int maxX = 1;
        int minY = 0;
        int maxY = 2;
        int minZ = 1;
        int maxZ = 3;

        int absMinX = Math.abs(minX);
        int absMaxX = Math.abs(maxX);
        int absMinY = Math.abs(minY);
        int absMaxY = Math.abs(maxY);
        int absMinZ = Math.abs(minZ);
        int absMaxZ = Math.abs(maxZ);

        BlockPos mathCenterPos = new BlockPos((absMaxX - absMinX) / 2, (absMaxY - absMinY) / 2,
                (absMaxZ + absMinZ) / 2);

        BlockPos centerPos = pos.add(mathCenterPos); // center pos of the given cube
        BlockPos aboveCenterPos = centerPos.add(0, 1, 0); // 1 block above the center pos

        for (int offsetZ = minZ; offsetZ <= maxZ; offsetZ++) {
            for (int offsetX = minX; offsetX <= maxX; offsetX++) {
                for (int offsetY = minY; offsetY <= maxY; offsetY++) {
                    safetyCounter++;

                    if (worldObj.getBlockState(pos.add(offsetX, offsetY, offsetZ)) == Blocks.brick_block.getDefaultState()) {
                        counter++;
                    }
                    if (safetyCounter == 27) {
                        if (counter == 25 && worldObj.getBlockState(centerPos) == Blocks.glass.getDefaultState()
                                && worldObj.getBlockState(aboveCenterPos) == Blocks.glass.getDefaultState()) {
                            isComplete = true;
                            System.out.println(isComplete);
                        } else {
                            isComplete = false;
                            System.out.println(counter);
                        }
                    }
                }
            }
        }
    }

    @Override
    public void update() {
        onBlockAdded();

    }

}