for i from 0 to 5 do L[i]:= TangentToEllipse(c,d,t[i]): od:
for i from 0 to 5 do P[i]:= Pt (L[i],L[i+1 mod 6]): od:
Concurrent ( Le (P[0],P[3]) , Le (P[1],P[4]) , Le (P[2],P[5]) ): end:
end: