Simulation program for galaxy arm forming with constant torsion
500		Number of masses
1.5	0.0025	tmax, delta_t
20.	10.	v, vr
2.	3	r0 (radius of initial disk), Number of arms
0.5		d (diameter of initial disk)
0.4		random factor


Simulation program for galaxy arm forming with constant torsion
10		Number of masses
2.	0.1	tmax, delta_t
20.	10.	v, vr
2.	3	r0 (radius of initial disk), Number of arms
0.2		random factor


