\startMPpage
StartPage ;

numeric row, col, unit; 
pair  middle;
row := 1; col := 1;
unit := 2 * cm ;
picture p, q ; p := nullpicture; q := nullpicture;
string l[];
l[0] := "2" ; l[1] := " 4"; 

for i= 0 upto row :
middle := (i * unit, 5cm);
p := thelabel( l[i], middle); 
draw p;
%q := p reflectedabout (0.5[urcorner p, ulcorner p], 0.5[lrcorner p, llcorner p]);
%draw q
endfor
StopPage ;
\stopMPpage
\stoptext