Counting on and back in multiples of 10
80 20 -40 -70 160 340 460 520 110 50 10 -10 -30 170 130 50 10 -30 40 250 320 460 -70 30 180 280 800 560 400 320 -10 260 350 530 290 110 -10 -130
80 20 -40 -70 160 340 460 520 110 50 10 -10 -30 170 130 50 10 -30 40 250 320 460 -70 30 180 280 800 560 400 320 -10 260 350 530 290 110 -10 -130