data one;                                                                           
   input trt_group time subject results;                                                                                                
   datalines;                                                                                                                           
1   2   100  20                                                                                                                         
1   4   100  30                                                                                                                         
1   6   100  35                                                                                                                         
1   8   100  50                                                                                                                         
1   2   200  40                                                                                                                         
1   4   200  25                                                                                                                         
1   6   200  40                                                                                                                         
1   8   200  30                                                                                                                         
1   2   300  25                                                                                                                         
1   4   300  40                                                                                                                         
1   6   300  45                                                                                                                         
1   8   300  55                                                                                                                         
2   2   400  15                                                                                                                         
2   4   400  35                                                                                                                         
2   6   400  50                                                                                                                         
2   8   400  45                                                                                                                         
2   2   500  35                                                                                                                         
2   4   500  35                                                                                                                         
2   6   500  20                                                                                                                         
2   8   500  35                                                                                                                         
;                                                                                                                                       
run;                                                                                                                                        

proc template;
  define statgraph grouping;
  begingraph;
  entrytitle 'Study Results by Treatment Group';
    layout overlay;
         seriesplot x=time y=results/ group=subject linecolorgroup=trt_group name='grouping';
         discretelegend 'grouping' / type=linecolor;
      endlayout;
  endgraph;
end;

proc sgrender data=one template=grouping;
run;

proc sgplot data=one;
title 'Study Results by Treatment Group';
series x=time y=results / group=subject grouplc=trt_group name='grouping';
keylegend 'grouping' / type=linecolor;
run;