// aansluitingen
solidpen 128 128 128 5
moveto -20 20
lineto 100 20
moveto -20 200
lineto 100 200
// chain
solidpen 0 0 255 1
//roundrect 0 0 21 155 5 5
solidpen 255 0 0  0
solidbrush 0 0 0 
rectangle 8 10 13 30
rectangle 8 170 13 230 
//solidpen 192 192 192 3
solidpen 192 192 192 0
moveto 5 5 
lineto 5 230
moveto 15 5
lineto 15 230
moveto  5  7
lineto 15  7
moveto  5  17
lineto 15  17
moveto  5  27
lineto 15  27
moveto  5  37
lineto 15  37
moveto  5  47
lineto 15  47
moveto  5  57
lineto 15  57
moveto  5  67
lineto 15  67
moveto  5  77
lineto 15  77
moveto  5  87
lineto 15  87
moveto  5  97
lineto 15  97
moveto  5  107
lineto 15  107
moveto  5  117
lineto 15  117
moveto  5  127
lineto 15  127
moveto  5  137
lineto 15  137
moveto  5  147
lineto 15  147
moveto  5  157
lineto 15  157
moveto  5  167
lineto 15  167
moveto  5  177
lineto 15  177
moveto  5  187
lineto 15  187
moveto  5  197
lineto 15  197
moveto  5  207
lineto 15  207
moveto  5  217
lineto 15  217
moveto  5  227
lineto 15  227