Advance over a field

One common occurance in wars is trying to advance over a field under enemy fire. To simulate this, the following rules are used:

A field has two values: How difficult it is to pass, and how dangerous it is (enemy fire, mines etc).

Each turn, you roll 1D10 - danger. The resulting number is how far you advance along the field. If you get a negative result, that results in you getting hit.

When you have advanced along the field a number of steps equal the difficulty value, you have reached your destination, and the next scene starts.

The difficulty value is both a value of how hard it is to cross the field and how difficult it is to traverse.