创建自己的传送门

let greenPortal = Portal(color: #colorLiteral(red: 0.4028071761, green: 0.7315050364, blue: 0.2071235478, alpha: 1))

world.place (greenPortal, atStartColumn:

            1,

            startRow: 5,atEndColumn: 5, endRow: 1)

greenPortal.isActive = false

func 宝() {

    if isOnGem {

        collectGem()

    }

}

func 左() {

    moveForward()

    turnRight()

    moveForward()

    turnRight()

    turnRight()

}

for i in 1 ... 4 {

    宝()

    左()

}

greenPortal.isActive = true

moveForward()

greenPortal.isActive = false

moveForward()

turnRight()

turnRight()

for i in 1 ... 4 {

    宝()

    左()

}