The rope is marked for outdoor race.
5 pieces of tape or other marking devices should be installed on the rope by the thousands?, has the following characteristics:
1. use 1 tape or 1 thousand middle rope marks.
2. use the 2 billion mark, tape or 2 away from the middle rope out 4 m.
3. use the 2 billion mark, tape or 2 away from the middle rope 5 m per side.
4. tape marks on 1, 2, and 3 above, use a different color. The number of 3 colors (picture below).