6✖️6✖️18 OK
It's better to go backwards.
My fastest time is 91seconds.
It's a good balance.
today, i stick the tape on the floor, but sise was long. and its like Ｔ，rex now.
My Thymio knock down 5x5x15, 6x6x18 and 7x7x21block towers.
I made program likes on print. but, robot fell off! because i made controll terribley.
It was difficult.
I was able to customize it.
i made program because, i need to countroll my robot .