Observe the image below. Pay special to the connecting lines between the flowers. I've deliberately alternated one and two lines between flowers, because they demand complete concentration.
To determine the route to follow for the onward journey, just trace the pattern with a pencil. There is just one rule you have to follow.
Step 1: This is the route I have chosen. I've stopped and 50. This is not necessarily the only way. You can can go all the way up to 2.
No matter which route you choose for the forward journey, remember to take care of all the side trips in the return journey.