METAFONTの例

     beginchar(65,10pt#,10pt#,0pt#);
     pickup pencircle xscaled 1.2pt yscaled 0.5pt rotated 120; 
     z1=(0.1w,0.75h);
     z2-z1=whatever*(8,1);
     x2=0.9w;
     z3=(0.8w,0.1h);
     draw z1--z2{z1-z2}..{z2-z1}z3;
     labels(1,2,3);
     endchar;
     end.