On this step, we are going to count up 8 times starting from 37. Or, if it matters, we will count 8 times by 10 starting from 370.

Click to start counting. You can also do it step by step.

An overflow is indicated with a red light on top of the 9th token. The rule is the same as before: clean the position and pass the token to the left. In case of another overflow, do it again.

The yellow light marks the position, in which the counting is taking place. On overflow it blinks red and splits. Another light travels to the left and blinks red if there is no room in this position, too. When the overflow is settled, the counting resumes at the initial light.