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I'm in the last task befor the array chapter, with creating my own world.No I'm facing the problem the the platforms do not react on the platformlock.my code is locking that way:world.place(PlatformLock(color: green), facing: west, atColum: 7, row: 6)world.place(Platform(onLevel: 2, controlledBy: PlatformLock(color: green)), atColum3, row: 0)In my code the platform is not moving up when the PlatformLock is getting triggered by the expert.In the previous chapter with existing platforms, I do see they have the color of the PlatformLock. My ones are all the same color and I think that could be the problem, doesn't it?How can I match each Platform with its PlatformLock?Thanks your any idea :-)