##Pyth, <s>21</s> 20 bytes
    J*6S*5"/\\"V6V4J)=_J
[Try it online!](https://tio.run/##K6gsyfj/30vLLFjLVEk/JkYpzCzMxEvTNt7r/38A)

####Python 3 translation:
    J=6*sorted(5*"/\\")
    for N in range(6):
        for N in range(4):
            print(J)
        J=J[::-1]