Mars rover would detect each rock as it follows its path. The mars rover starts off in front of rocks. Then then the mars rover will go forward about 4 meters. The rover will then go left and then turn right for 6 meters. After that it will go down a few meters. Then it will be like a zig zag as you go right then down then left and you will end up in your end position.

The Edison will start on the sheet of paper and would be coded to sense the line. Then it will gradually follow the path/ line around the rocks. First it will go straight forward for a few meters. After its past 3 rocks it will turn right for about 3 meters. Then it will keep on going straight for another 3 meters. After that it will turn right then down then go left till it ends in its end position past all the rocks.