Spawn a Mob in Map?

[TRBizeps 65]

Can somebody say me, how i can spawn a monster in the Map that Spawns always random?

[HellBoy 229]

make a regen with more spots to spawn for same mob and with idk 20% respawn chance. 

[TRBizeps 65]

can u show me a example?

[HellBoy 229]

m	882	227	100	100	0	0	3600s	25	1	1093
m	272	365	100	100	0	0	3600s	25	1	1093
m	435	165	100	100	0	0	3600s	25	1	1093
m	880	683	100	100	0	0	3600s	25	1	1093
m	449	606	100	100	0	0	3600s	25	1	1093
m	145	713	100	100	0	0	3600s	25	1	1093

First 2 are the spawn coordonates  second 2 the max coordonates points that can be added to the main coordonates third 2 the direction [useless for mobs]  3600s the respawn time in seconds 25 the probablility to respawn again 1 the numbers of mobs 1093 mob ID