Recreate the Front Panel below

Edit the Block Diagram:

• Simulate signal
  • Express->Input->Simulate Signal
  • Swith on "Add noise"
  • Default values are OK
• Expand Simulate Signal maximally (mark and drag the bottom blue expand box)
• Connect the knobs with Amplitude, Frequency, Phase og Noise and adjust min/max values
• Connect it all and run your VI continually
• Turn the knobs:)
• Add a filter express VI
  • Express->Signal Analysis->Filter
  • Choose "Lowpass"
  • Default values are OK
• Also expand this filter maximally
• Connect another knob with "Lower Cut-Off"
• Merge the two signals (raw + filtered) using a "Merge Signals" and set this as the input to the graph. 
• Expand the legend to contain both curves (top right corner)
• Save your VI as WaveformGraphs.vi