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.