# A square with a circle inside, represents a machine
handle: name $x+w/2$ $y-4$ middle
handle: input1 $x$ $y+h/4$ right
handle: input2 $x$ $y+h/2$ right
handle: input3 $x$ $y+3*h/4$ right
handle: output1 $x+w$ $y+h/4$ left
handle: output2 $x+w$ $y+h/2$ left
handle: output3 $x+w$ $y+3*h/4$ left
<rect x="$x+10$" y="$y$" width="$w-20$" height="$h$" fill="white" stroke="black" stroke-width="1"/>

<rect x="$x$" y="$y+h/4$" width="12" height="4" fill="black" stroke="black" stroke-width="1"/>
<rect x="$x$" y="$y+h/2$" width="12" height="4" fill="black" stroke="black" stroke-width="1"/>
<rect x="$x$" y="$y+3*h/4$" width="12" height="4" fill="black" stroke="black" stroke-width="1"/>

<rect x="$x+w-12$" y="$y+h/4$" width="12" height="4" fill="black" stroke="black" stroke-width="1"/>
<rect x="$x+w-12$" y="$y+h/2$" width="12" height="4" fill="black" stroke="black" stroke-width="1"/>
<rect x="$x+w-12$" y="$y+3*h/4$" width="12" height="4" fill="black" stroke="black" stroke-width="1"/>
<circle cx="$x+w/2$" cy="$y+h/2$" r="$w/3$" fill="blue"/>