diff --git a/pk_optimizer/pkGUI.py b/pk_optimizer/pkGUI.py
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+++ b/pk_optimizer/pkGUI.py
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+#!/usr/bin/env python
+# coding: utf-8
+
+# In[9]:
+
+
+#Import Everything
+
+class pkGUI:
+    """The pkGUI object creates a GUI of size x by y to display the optimization of parameters for PK models."""
+    
+    def __init__ (self, xdim = 512, ydim = 320, numParam = 4, Flow = 1, Vp = 0.1, Visf = 0.5, PS = 0.15):
+        
+        """Initializes the GUI with default size 512 by 320 pixels and one button to start optimization.
+        Parameters
+        ----------
+        xdim : int
+            xdim is used for defining the x dimension of your GUI size.
+        
+        ydim : int
+            ydim is used for defining the y dimension of your GUI size.
+            
+        numParam: int
+            numParam is the number of parameters you want to optimize for the model. Defaults to 4.
+            
+        Flow : double
+            Flow is the flow of plasma through the blood vessel in mL/(mL*min). Defaults to 1.
+        
+        Vp : double
+            Vp is the volume of plasma in mL. Defaults to 0.1.
+            
+        Visf : double
+            Visf is the volume of interstitial fluid in mL. Defaults to 0.5.
+        
+        PS : double
+            PS is the permeability-surface area constant in mL/(g*min). Defaults to 0.15.      
+        """
+        
+        self.xdim = xdim
+        self.ydim = ydim
+        self.numParam = numParam
+        self.Flow = Flow
+        self.Vp = Vp
+        self.Visf = Visf
+        self.PS = PS
+        
+        #build GUI with dims x, y
+        #build button in center named Optimize!
+        
+    def slider(numParam = 4, labels = ['Flow', 'Vp', 'Visf', 'PS']):
+        """Adds a slider for each parameter to the GUI with labels as their names.
+        Parameters
+        ----------
+        numParam : int
+            numParam is defaulted to 4 (self.numParam) and is used for defining the number of sliders in th GUI.
+        
+        labels : str[]
+            labels are defaulted to Flow, Vp, Visf, and PS, and are used for naming the sliders.
+        """
+        #Creates and sliders with names for each model.
+        #EVENT: move sliders = move parameter values and change model
+        
+    def IOBoxes(numParam = 4):
+        """Creates text boxes for initial guesses and output text boxes for final parameter values.
+        Parameters
+        ----------
+        numParam : int
+            numParam is defaulted to 4 (self.numParam) and is used for defining the number of text boxes in th GUI.
+        """
+        #Creates text boxes for initial guesses
+        #Creates text boxes for displaying output (optimized) values.
+        
+    def passValues(paramName, paramVal):
+        """If a parameter is changed from slider, it will pass the changes to the Model object and text boxes.
+        Parameters
+        ----------
+        paramName : str
+            paramName is the name of the parameter that changed.
+            
+        paramVal : double
+            paramVal is the new value of the parameter that is passed to the model and text boxes.
+        """
+        self.paramName = paramVal
+        
+        #update text box output
+        #update model
+        
+    def getValues(paramName, model):
+        """Get the parameter value of paramName from model model.
+        
+        Parameters
+        ----------
+        paramName : str
+            paramName is the name of the parameter that changed.
+            
+        model : model object
+            model is the model you want to get values from.
+        """
+        #call object for value
+        
+    def dispModel(objModel):
+        """Displays a Model object in GUI.
+        Parameters
+        ----------
+        objModel : Model object
+            objModel will be either a 1 Comp or 2 Comp model and will be displayed in the GUI.
+        """
+    #Displays model in GUI
+
+
+# In[ ]:
+
+
+
+