These exercises cover the use of path in a shape.
startshape MyShape path Line1 { MOVETO {x 0 y 0} LINETO {x 1 y 1} STROKE {width .01} } rule MyShape { Line1 {} }

startshape MyShape path Line1 { MOVETO {x 0 y 0} LINETO {x 1 y 1} LINETO {x 0 y 1} LINETO {x 1 y 0} LINETO {x 0 y 0} STROKE {width .01} } rule MyShape { Line1 {} }

startshape MyShape path Line1 { MOVETO {x 0 y 0} LINETO {x 1 y 0} STROKE {width .01} } rule MyShape { Line1 {r 25} }
