First you need 6 metal foundations, double door frames, triangle Sloped ceilings and two thatch foundations

Place one triangle foundation and continue with one side two thatch foundations and place the next triangle foundation and pick up the thatch foundations repeat this until you reach where you started the first triangle foundation after that place the six double doorframes (outer part) then place the triangle sloped ceilings facing towards the middle

Easy, and its antidirectional! Once the giga hops in it cannot get out!

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