Generated by means of the following PostScript code:

%!
6 dup scale/!{def}def/s{setrgbcolor}!/l{stroke}!
/S{3 sqrt mul}!/k{0 0 0 s 4.4 setlinewidth}!
/K{1 1 1 s 2.2 setlinewidth}!/C2{25 3 sqrt div}!
/C3{25 6.25 cos div}!/C4{C3 6.25 sin mul}!
/C5{50 C2 C4 sub C3}!
/X{C2 12.5 S add C4 2 div add}!
/Y{X 25 C4 S add 2 div add}!
/C6{62.5 C4 S 2 div add X C3}!
/C7{37.5 C4 S 2 div sub X C3}!
/C8{C6 exch 25 C4 S add add exch}!
/C9{C7 exch 25 C4 S add add exch}!
/CA{50 Y C2 C4 sub sub sub Y C3}!
/CB{50 Y C2 C4 sub sub add Y C3}!
/CC{50 X 2 mul 25 C4 S add add C2 C4 sub sub C3}!
k
/swing{87.06}def/swing2{swing 75 add}def
C7 45 swing2 sub 45 swing2 add arc l
C6 135 swing2 sub 135 swing2 add arc l
C8 225 swing2 sub 225 swing2 add arc l
C9 315 swing2 sub 315 swing2 add arc l
C5 90 swing sub 90 swing add arc l
CA swing neg swing arc l
CB 180 swing sub 180 swing add arc l
CC 270 swing sub 270 swing add arc l
K
/swing{85.49}def/swing2{swing 75 add}def
C7 45 swing2 sub 45 swing2 add arc l
C6 135 swing2 sub 135 swing2 add arc l
C8 225 swing2 sub 225 swing2 add arc l
C9 315 swing2 sub 315 swing2 add arc l
C5 90 swing sub 90 swing add arc l
CA swing neg swing arc l
CB 180 swing sub 180 swing add arc l
CC 270 swing sub 270 swing add arc l
k
C5 108 120 arc l C7 -12 0 arc l C6 228 240 arc l
CA 18 30 arc l C9 -102 -90 arc l C7 138 150 arc l
CB 198 210 arc l C6 78 90 arc l C8 318 330 arc l
CC 288 300 arc l C8 168 180 arc l C9 48 60 arc l
C6 119 133 arc l C6 160 175 arc l
C7 29 43 arc l C7 70 85 arc l
C8 209 223 arc l C8 250 265 arc l
C9 299 313 arc l C9 340 355 arc l
K
C5 107 121 arc l C7 -13 1 arc l C6 227 241 arc l
CA 17 31 arc l C9 -103 -89 arc l C7 137 151 arc l
CB 197 211 arc l C6 77 91 arc l C8 317 331 arc l
CC 287 301 arc l C8 167 181 arc l C9 47 61 arc l
C6 118 134 arc l C6 159 176 arc l
C7 28 44 arc l C7 69 86 arc l
C8 208 224 arc l C8 249 266 arc l
C9 298 314 arc l C9 339 356 arc l
showpage
%EOF