352 CHAPTER 11.PROGRAMMING IN MATLAB 30 25 5 30 3 2 5 y 5 10 15 20 25 30 Figure 11.12:After about 8000 time-steps all the molecules have stuck to the cold wall of the cold trap.352 CHAPTER 11. PROGRAMMING IN MATLAB −1 0 1 2 3 4 5 6 7 8 5 10 15 20 25 30 5 10 15 20 25 30 Figure 11.12: After about 8000 time-steps all the molecules have stuck to the coldwall of the coldtrap