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def sideonetop =
z0 = (0w,.5h);
penpos0(croswid, a4);
z1 = z0;
penpos1(knotwid, a4);
z2 = (.25w,.75h);
penpos2(knotwid, a4);
z3 = (.75w,.75h);
penpos3(knotwid, a3);
z4 = z6r;
penpos4(knotwid, a3);
z5 = (w,.5h);
penpos5(croswid, a2);
z6 = z5;
penpos6(knotwid, a2);
z7 = (.75w,.25h);
penpos7(knotwid, a2);
z8 = (.75w,0h);
penpos8(knotwid, a2);
z9 = (.25w,0h);
penpos9(knotwid, a1);
z10 = (.25w,.25h);
penpos10(knotwid, a1);
z11 = z0r;
penpos11(knotwid, a1);
llrrexp(11);
penstroke z1e---z2e---z3e---z4e;
penstroke z6e---z7e{down}---z8e;
penstroke z9e---{up}z10e---z11e;
enddef;
def sideonebot =
z0 = (1w,.5h);
penpos0(croswid, a2);
z1 = z0;
penpos1(knotwid, a2);
z2 = (.75w,.25h);
penpos2(knotwid, a2);
z3 = (.25w,.25h);
penpos3(knotwid, a1);
z4 = z6r;
penpos4(knotwid, a1);
z5 = (0w,.5h);
penpos5(croswid, a4);
z6 = z5;
penpos6(knotwid, a4);
z7 = (.25w,.75h);
penpos7(knotwid, a4);
z8 = (.25w,1h);
penpos8(knotwid, a1);
z9 = (.75w,1h);
penpos9(knotwid, a2);
z10 = (.75w,.75h);
penpos10(knotwid, a3);
z11 = z0r;
penpos11(knotwid, a3);
llrrexp(11);
penstroke z1e---z2e---z3e---z4e;
penstroke z6e---z7e{up}---z8e;
penstroke z9e---{down}z10e---z11e;
enddef;
beginchar ("`", sqwid#, sqht#, 0); "sideone top";
sideonetop;
endchar;
beginchar ("a", sqwid#, sqht#, 0); "sideone bot";
sideonebot;
endchar;
beginchar ("b", sqwid#, sqht#, 0); "sideone left";
sideonetop;
currentpicture := currentpicture rotated 90 shifted (w, 0);
endchar;
beginchar ("c", sqwid#, sqht#, 0); "sideone right";
sideonebot;
currentpicture := currentpicture rotated 90 shifted (w, 0);
endchar;
def sidetwotop =
z0 = (0w,.5h);
penpos0(croswid, a4);
z1 = z0;
penpos1(knotwid, a4);
z2 = z3r;
penpos2(knotwid, a4);
z3 = (.5w,1h);
penpos3(croswid, a3);
z4 = z3;
penpos4(knotwid, a3);
z5 = z6r;
penpos5(knotwid, a3);
z6 = (1w,.5h);
penpos6(croswid, a2);
z7 = z6;
penpos7(knotwid, a2);
z8 = (.75w,.25h);
penpos8(knotwid, a2);
z9 = (.75w,0h);
penpos9(knotwid, a2);
z10 = (.25w,0h);
penpos10(knotwid, a1);
z11 = (.25w,.25h);
penpos11(knotwid, a1);
z12 = z0r;
penpos12(knotwid, a1);
llrrexp(12);
penstroke z1e---z2e;
penstroke z4e---z5e;
penstroke z7e---z8e{down}---z9e;
penstroke z10e---{up}z11e---z12e;
enddef;
def sidetwobot =
z0 = (1w,.5h);
penpos0(croswid, a2);
z1 = z0;
penpos1(knotwid, a2);
z2 = z3r;
penpos2(knotwid, a2);
z3 = (.5w,0h);
penpos3(croswid, a1);
z4 = z3;
penpos4(knotwid, a1);
z5 = z6r;
penpos5(knotwid, a1);
z6 = (0w,.5h);
penpos6(croswid, a4);
z7 = z6;
penpos7(knotwid, a4);
z8 = (.25w,.75h);
penpos8(knotwid, a4);
z9 = (.25w,1h);
penpos9(knotwid, a1);
z10 = (.75w,1h);
penpos10(knotwid, a2);
z11 = (.75w,.75h);
penpos11(knotwid, a3);
z12 = z0r;
penpos12(knotwid, a3);
llrrexp(12);
penstroke z1e---z2e;
penstroke z4e---z5e;
penstroke z7e---z8e{up}---z9e;
penstroke z10e---{down}z11e---z12e;
enddef;
beginchar ("d", sqwid#, sqht#, 0); "sidetwo top";
sidetwotop;
endchar;
beginchar ("e", sqwid#, sqht#, 0); "sidetwo bot";
sidetwobot;
endchar;
beginchar ("f", sqwid#, sqht#, 0); "sidetwo left";
sidetwotop;
currentpicture := currentpicture rotated 90 shifted (w, 0);
endchar;
beginchar ("g", sqwid#, sqht#, 0); "sidetwo right";
sidetwobot;
currentpicture := currentpicture rotated 90 shifted (w, 0);
endchar;
def sidehoriz =
z1 = (.25w, h);
penpos1(knotwid, 3);
z2 = (.25w, 0h);
penpos2(knotwid, 3);
z3 = (.75w, h);
penpos3(knotwid, 2);
z4 = (.75w, 0h);
penpos4(knotwid, 2);
llrrexp(4);
penstroke z1e---z2e;
penstroke z3e---z4e;
enddef;
beginchar ("h", sqwid#, sqht#, 0); "horizontal side";
sidehoriz;
currentpicture := currentpicture rotated 90 shifted (w, 0);
endchar;
beginchar ("i", sqwid#, sqht#, 0); "verticle side";
sidehoriz;
currentpicture := currentpicture rotated 90 shifted (w, 0);
endchar;
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