Plot and Display command

[hsakarp]

Hello,
I am trying to do dynamic analysis and plot the graph (Displacement Vs Time) on OPenSees.I am geeting the problem on plotting and displaying the graph. My code is as follows:

#create display
recorder display "displacement" 10 10 900 900 -wipe
prp 0 18 1.0
vup 0 1 0
vpn 0 0 1
viewWindow -50 50 -100 100
display -1 5 20

#plot
recorder plot Data/DFree.out "displacement1" 500 500 1000 1000 -columns 15 15

I would be grateful if someone guides me on the process of plotting and displaying the Displacement vs Time graph on OpenSees.
Thank you