diff --git a/RouteFinding/05_tests.py b/RouteFinding/05_tests.py
index dd669d8..d3febba 100644
--- a/RouteFinding/05_tests.py
+++ b/RouteFinding/05_tests.py
@@ -2,9 +2,19 @@
 import DRDViz
 
 class SearchNode:
-    def __init__(self, label, value):
+    def __init__(self, label, pathcost):
         self.label = label
-        self.value = value
+        self.pathcost = pathcost
+        self.node = tuple((label, pathcost))
+    def showBasic(self):
+        # print(self.node) # debugging purposes
+        return self.node
+    def __eq__(self, object):
+        return ((self.label) == (object.label))
+    def __lt__(self, object):
+        return ((self.label) < (object.label))
+    def __repr__(self):
+        return repr(self.node)
 
 class Searcher:
     def __init__(self, mapfile):
@@ -60,9 +70,59 @@ class Searcher:
         # need to get the myViz attribute by importing the DRDViz stuff.
         self.myViz = DRDViz.DRDViz()
         # now, start using the myViz thingy to 'display' a map.
+        self.myViz.loadGraphFromFile(mapfile)
+        self.myViz.plot()
+        # create an 'open' list
+        self.open = list()
     def setStartGoal(self, startNode, endNode):
         self.startNode = startNode
         self.endNode = endNode
+        self.myViz.markStart(self.startNode)
+        self.myViz.markGoal(self.endNode)
+        # add the starting node to the 'open' list.
+        starting = SearchNode(startNode, 0)
+        self.open.append(starting)
+    def successors(self, parentNode):
+        childList = list()
+        # grab the nodes from the nested dictionary given that the parentNode is a tuple.
+        nodeChildren = self.nodePaths.get(parentNode.label)
+        # grab each value from the dictionary, turn it into a SearchNode.
+        for node in nodeChildren.keys():
+            childList.append(SearchNode(node, int(nodeChildren[node])))
+        # sort the child node list
+        childList.sort()
+        return (childList)
+    def reset(self):
+        # clear all the items from the open list
+        self.open.clear()
+        # add the start node back into the list.
+        self.open.append(SearchNode(self.startNode, 0))
+        # do I need to reset the visualization too?
+    def insert_front(self, nodeList):
+        # backwards "sort"
+        # loop through each element, and apply it to the beginning of the open list.
+        for item in nodeList:
+            if item not in self.open:
+                self.open.insert(0, item)
+        return None
+    def insert_end(self, nodeList):
+        # forwards "sort"
+        # loop through each element, and apply it to the end of the open list.
+        for item in nodeList:
+            if item not in self.open:
+                self.open.append(item)
+        return None
+    def insert_ordered(self, nodeList):
+        # sort by the lowest cost after adding all the elements to the open list.
+        # add the nodes to the list
+        self.open.extend(nodeList)
+        # sort via a lambda function key, using the sorted function
+        sortedList = sorted(self.open, key=lambda item: item.pathcost)
+        # clear out the open list
+        self.open.clear()
+        # replace it with the sorted list by extending the blank list.
+        self.open.extend(sortedList)
+        return None
 
 # (b) Show your program loading in the 30-node sample file. 
 # s=Searcher("30node.txt")
diff --git a/RouteFinding/30node.png b/RouteFinding/30node.png
index 17b4ea0..07c0e6a 100644
Binary files a/RouteFinding/30node.png and b/RouteFinding/30node.png differ
diff --git a/RouteFinding/interpreter.py b/RouteFinding/interpreter.py
new file mode 100644
index 0000000..c6b38b7
--- /dev/null
+++ b/RouteFinding/interpreter.py
@@ -0,0 +1,23 @@
+import code
+import re
+class FileConsole(code.InteractiveConsole):
+    """Emulate python console but use file instead of stdin"""
+    def raw_input(self, prompt):
+        line = self.f.readline()
+        if line=="":
+            raise EOFError()
+        no_newline = line.replace("\n", "")
+        no_indent = re.match(r"^\s", line) is None
+        print(prompt, no_newline, sep="")
+        return no_newline
+    
+def run_file(filename):
+    fc = FileConsole()
+    fc.f = open(filename)
+    fc.interact(banner="", exitmsg="")
+
+if __name__ == "__main__":
+    import sys
+    sys.ps1 = "\n>>> "
+    run_file(sys.argv[1])
+