It’s pretty much inevitable that you will walk across a street at some point. How you cross it is determined by a number of factors, including your desire to cross it safely. Although it’s not inevitable that you will cross the street with your eyes open, it’s a good bet, given your desire not to be injured or killed.
What if you come to believe that all your behavior is fully determined: that in any given situation you couldn’ t have done other than what you did, given all the factors operating? How might this change, if at all, your approach to crossing the street?
If determinism is true, then the way you cross the street next time is fully a function of various factors coming to bear at that time. If you cross the street with your eyes open, that’s determined, if you cross it with eyes closed, that’s determined too.
But then, as a fatalist, you might say: "The future is fixed: I’m either fated to get across the street safely or not. If I am fated to be hit by a car, then it doesn’ t matter what precautions I take. Since the future is fixed, it doesn’ t matter what I do."