so you wanna make a solar system or something?

If those orbits are constans You may use paths...
and when ship reach last node add +1 to var f.e. oribts_count.
If orbits_count >=10 go to next path
About paths look HERE

If not... add two another vars
var starting_pan;
var orbit_counts =0;
at the beggining of ship's action set
starting_pan = my.pan (not in loop)
my.pan %= 360;

Then In loop add
if(abs(starting_pan - my.pan) >=360){orbits_count +=1;}
if(orbits_count >=10){radius += 50; orbits_count = 0;}

Not tested but something like this