diff --git a/collects/mztake/demos/random/random-Xs-test.ss b/collects/mztake/demos/random/random-Xs-test.ss
deleted file mode 100644
index a36d725f97..0000000000
--- a/collects/mztake/demos/random/random-Xs-test.ss
+++ /dev/null
@@ -1,107 +0,0 @@
-#|   The program being debugged (a module in the file "random-xs.ss") runs an infinite loop,
-     binding "x" to a random number between [0,100) each iteration.
-     
-     This MzTake script draws a histogram of the values of x seen over time,
-     in sync with the execution of "random-xs.ss". This will run until one
-     bar reaches the top of the screen.     
-
-     This histogram provides three pieces of information:
-      * Each bar represents a bin, the height represents how many times
-        that "random" number was generated.
-
-      * The brighter the blue, the faster that bin is growing compared
-        to the others. The darker, the slower.
-
-      * You can see a history of speeds over time based on how the colors
-        change in each bin.
-
-     Try looking for small groupings of bins where all are light, or all
-     are dark -- these represent small trends in the numbers.
-
-     Look for tortoises that stay low and black, and hares which are very
-     active and bright.
-
-     The bars drag a bit when moving upwards (the height goes up by 2, but
-     the redrawing of the latest color goes down 10 pixels) so that you can
-     spot vertical trends more easily.  |#
-
-
-(require (lib "graphics.ss" "graphics")
-         #| Needed for open-graphics, open-viewport, and draw-solid-ellipse |#
-         
-         (lifted mzscheme
-                 make-hash-table
-                 hash-table-put!
-                 hash-table-get))
-#|       "Lifted" is explained in FrTime's own documentation (plt/collects/frtime/doc.txt)
-          Quickly put, lifting extends the functions listed above so they can take FrTime time-varying
-          values (such as MzTake traces) as arguments. |#
-
-
-
-(open-graphics)
-(define window (open-viewport "Debugger" 600 500))
-((draw-viewport window) (make-rgb 0.95 0.95 0.95))
-#| This file doesn't animate a list of objects since the number of
-   objects quickly reaches the thousands (slowing drawing time severly),
-   and they are stationary -- so we just keep drawing the circles at
-   their new heights based on the value in the hashtable.
-
-   See the doc for more information on this kind of drawing. |#
-
-
-
-(define-mztake-process p ("random-xs.ss" [x-trace 4 6 bind 'x]))
-#| * Create a process to debug random-xs.ss
-
-   * Add a tracepoint at line 4, column 6; in the program,
-     this is right before the next iteration of the loop is called,
-     ->(loop (random 200))
-
-   * At this tracepoint, define "x-trace" to a FrTime eventstream that
-     recieves events containing the latest value of "x" seen,
-     every time the code at line 4, column 6, is reached. |#
-
-(define largest-bin 0)
-(define valcount (make-hash-table))
-#| this will hold the counts for the histogram
-   x is the key, and the number of times x shows up is the value |#
-
-
-(hold (x-trace . -=> .(printf-b "largest count: ~a" largest-bin)))
-#| Prints out the largest count every time we get a new x-trace event |#
-
-
-(map-e (lambda (x)
-         (let* ([new-cnt (add1 (hash-table-get valcount x (lambda () 0)))]
-                [color (/ new-cnt (add1 largest-bin))])
-           
-           (when (= largest-bin 250)
-             (kill p))
-           ; when one of the bars reaches the top of the screen, kill the program.
-           
-           (when (> new-cnt largest-bin) (set! largest-bin new-cnt))
-           ; keep track of the largest count
-           
-           (hash-table-put! valcount x new-cnt)
-           ;; increment the value in the hashtable, starting from 0 if none exists.
-           
-           ((draw-solid-rectangle window) (make-posn (* x 6)  (- 500 (* 2 new-cnt)))
-                                          6 10 ;; width height
-                                          (make-rgb 0 (* 0.75 color) color))))
-       x-trace)
-#| Every time x-trace gets a new value, take this latest value and pass it to a function
-   which increments the count in the hashtable, and draws a circle in the window at
-   (* x 6) pixels from the left, and the height is (2 * the latest count in the hashtable for that x),
-   making a color (MAKE-RGB) that is lighter based on how fast it is growing.
-|#
-
-
-(printf-b "count: ~a" (count-b x-trace))
-#| prints the count of how many events x-trace got,
-   aka how many values are in the histogram and on the screen.
-|#
-
-
-(start/resume p)
-;; Start the process for random-xs.ss
\ No newline at end of file
diff --git a/collects/mztake/demos/random/random-Xs.ss b/collects/mztake/demos/random/random-Xs.ss
deleted file mode 100644
index 111122d58f..0000000000
--- a/collects/mztake/demos/random/random-Xs.ss
+++ /dev/null
@@ -1,5 +0,0 @@
-(module random-xs mzscheme
-  (define (run)
-    (let loop ([x (random 100)])
-      (loop (random 100))))
-  (run))
\ No newline at end of file