content: do
      (x0, y0) <- mouse
      let (x, y) = quantise2 quantum (x0, y0)
      root <- currentPlane
      input213  <-  new' "input"
      input214  <-  new' "input"
      ladder215  <-  new' "ladder"
      sum216  <-  new' "sum"
      container217 <- container' "panel_ladder.png" (x+(0.0), y+(-12.0)) (Inside root)
      plugin221 <- plugin' (ladder215 ! "freq") (-288.0,-60.0) (Inside container217)
      setColour plugin221 "#sample"
      hide plugin221
      plugout226 <- plugout' (sum216 ! "result") (-348.0,-60.0) (Inside container217)
      setColour plugout226 "#sample"
      hide plugout226
      knob223 <- knob' (input213 ! "result") (x+(48.0), y+(0.0)) (Outside container217)
      setLow knob223 (Just (0.0))
      setHigh  knob223 (Just (3.999))
      knob224 <- knob' (input214 ! "result") (x+(48.0), y+(60.0)) (Outside container217)
      setLow knob224 (Just (-1.0))
      setHigh  knob224 (Just (0.7))
      plugin218 <- plugin' (ladder215 ! "signal") (x+(-48.0), y+(-132.0)) (Outside container217)
      setColour plugin218 "#sample"
      plugin219 <- plugin' (sum216 ! "signal1") (x+(48.0), y+(60.0)) (Outside container217)
      setColour plugin219 "#sample"
      hide plugin219
      plugin220 <- plugin' (sum216 ! "signal2") (x+(0.0), y+(60.0)) (Outside container217)
      setColour plugin220 "#control"
      plugin222 <- plugin' (ladder215 ! "res") (x+(48.0), y+(0.0)) (Outside container217)
      setColour plugin222 "#sample"
      hide plugin222
      plugout225 <- plugout' (ladder215 ! "result") (x+(48.0), y+(-132.0)) (Outside container217)
      setColour plugout225 "#sample"
      cable plugout226 plugin221
      cable knob224 plugin219
      cable knob223 plugin222
      recompile
      set knob223 (2.0)
      set knob224 (-1.0)
      return ()
  