diff --git a/copycat/__init__.py b/copycat/__init__.py
index 14c0cc1..67e5cc9 100644
--- a/copycat/__init__.py
+++ b/copycat/__init__.py
@@ -1,2 +1 @@
 from .copycat import Copycat, Reporter  # noqa
-from .plot    import plot_answers
diff --git a/copycat/copycat.py b/copycat/copycat.py
index ade6a4d..da77ca5 100644
--- a/copycat/copycat.py
+++ b/copycat/copycat.py
@@ -64,6 +64,7 @@ class Copycat(object):
         if self.showgui:
             self.gui.refresh()
 
+
     def runTrial(self):
         """Run a trial of the copycat algorithm"""
         self.coderack.reset()
@@ -84,6 +85,11 @@ class Copycat(object):
         self.workspace.resetWithStrings(initial, modified, target)
         answers = {}
         for i in range(iterations):
+            if self.gui.app.primary.control.go:
+                initial, modified, target = self.gui.app.primary.control.get_vars()
+                self.workspace.resetWithStrings(initial, modified, target)
+                answers = {}
+
             answer = self.runTrial()
             d = answers.setdefault(answer['answer'], {
                 'count': 0,
diff --git a/copycat/gui/control.py b/copycat/gui/control.py
index 2e48959..069c69d 100644
--- a/copycat/gui/control.py
+++ b/copycat/gui/control.py
@@ -2,6 +2,7 @@ import tkinter as tk
 import tkinter.ttk as ttk
 
 from .gridframe import GridFrame
+from .entry     import Entry
 
 class Control(GridFrame):
     def __init__(self, parent, *args, **kwargs):
@@ -9,13 +10,20 @@ class Control(GridFrame):
 
         self.paused = True
         self.steps  = 0
+        self.go     = False
 
         self.playbutton = tk.Button(self, bd=0, text='Play', command=lambda : self.toggle(), background='black', foreground='white', activebackground='black', activeforeground='blue')
         self.add(self.playbutton, 0, 0)
 
-        self.stepbutton= tk.Button(self, bd=0, text='Step', command=lambda : self.step(), background='black', foreground='white', activebackground='black', activeforeground='blue')
+        self.stepbutton = tk.Button(self, bd=0, text='Step', command=lambda : self.step(), background='black', foreground='white', activebackground='black', activeforeground='blue')
         self.add(self.stepbutton, 1, 0)
 
+        self.entry = Entry(self)
+        self.add(self.entry, 0, 1, xspan=2)
+
+        self.gobutton = tk.Button(self, bd=0, text='Go', command=lambda : self.set_go(), background='black', foreground='white', activebackground='black', activeforeground='blue')
+        self.add(self.gobutton, 0, 2, xspan=2)
+
     def toggle(self):
         self.paused = not self.paused
         self.playbutton['text'] = 'Pause' if not self.paused else 'Play'
@@ -29,3 +37,9 @@ class Control(GridFrame):
             return True
         else:
             return False
+
+    def set_go(self):
+        self.go = True
+
+    def get_vars(self):
+        return self.entry.a.get(), self.entry.b.get(), self.entry.c.get()
diff --git a/copycat/gui/entry.py b/copycat/gui/entry.py
new file mode 100644
index 0000000..556a3f0
--- /dev/null
+++ b/copycat/gui/entry.py
@@ -0,0 +1,28 @@
+
+import tkinter as tk
+import tkinter.ttk as ttk
+
+from .gridframe import GridFrame
+
+style = dict(background='black', foreground='white')
+
+class Entry(GridFrame):
+    def __init__(self, parent, *args, **kwargs):
+        GridFrame.__init__(self, parent, *args, **kwargs)
+        self.aLabel = tk.Label(self, text='Initial:', **style)
+        self.a      = tk.Entry(self, **style)
+
+        self.add(self.aLabel, 0, 0)
+        self.add(self.a, 0, 1)
+
+        self.bLabel = tk.Label(self, text='Final:', **style)
+        self.b      = tk.Entry(self, **style)
+
+        self.add(self.bLabel, 1, 0)
+        self.add(self.b, 1, 1)
+
+        self.cLabel = tk.Label(self, text='Next:', **style)
+        self.c      = tk.Entry(self, **style)
+
+        self.add(self.cLabel, 2, 0)
+        self.add(self.c, 2, 1)
diff --git a/copycat/plot.py b/copycat/plot.py
deleted file mode 100644
index 7e6ec71..0000000
--- a/copycat/plot.py
+++ /dev/null
@@ -1,18 +0,0 @@
-import matplotlib.pyplot as plt; plt.rcdefaults()
-import numpy as np
-import matplotlib.pyplot as plt
- 
-plt.style.use('dark_background')
-
-def plot_answers(answers):
-    answers = sorted(answers.items(), key=lambda kv : kv[1]['count'])
-    objects = [t[0] + ' (temp:{})'.format(t[1]['avgtemp']) for t in answers]
-    yvalues = [t[1]['count'] for t in answers]
-
-    y_pos = np.arange(len(objects))
-     
-    plt.bar(y_pos, yvalues, align='center', alpha=0.5)
-    plt.xticks(y_pos, objects)
-    plt.ylabel('Count')
-    plt.title('Answers')
-    plt.show()
diff --git a/main.py b/main.py
index 36b5f0c..abc9c0b 100755
--- a/main.py
+++ b/main.py
@@ -27,7 +27,5 @@ def main():
     for answer, d in sorted(iter(answers.items()), key=lambda kv: kv[1]['avgtemp']):
         print('%s: %d (avg time %.1f, avg temp %.1f)' % (answer, d['count'], d['avgtime'], d['avgtemp']))
 
-    #plot_answers(answers)
-
 if __name__ == '__main__':
     main()