diff --git a/qtsit/algorithms/randomwalk.py b/qtsit/algorithms/randomwalk.py
index 36b4ed4..e0268e5 100644
--- a/qtsit/algorithms/randomwalk.py
+++ b/qtsit/algorithms/randomwalk.py
@@ -2,13 +2,61 @@
 Code for random walk algorithms.
 """
 
+import random
 
-def algorithm1(args: int) -> int:
-    """Summary
 
-    Parameters
-    ----------
-    args : _type_
-        _description_
+# abstract class walk - will be used in classical walk and quantum walk
+class walk:
+    """Abstract class for random walk algorithms.
     """
-    return args
+
+    def __init__(self, graph):
+        self.graph = graph
+        self.current_node = random.choice(graph.nodes())
+        self.visited = [self.current_node]
+        self.steps = 0
+
+    def walk(self, steps):
+        for i in range(steps):
+            self.step()
+
+    def step(self):
+        self.steps += 1
+        self.current_node = self.next_node()
+        self.visited.append(self.current_node)
+
+    def next_node(self):
+        pass
+
+    def get_visited(self):
+        return
+
+
+class classical_walk(walk):
+    """Classical random walk algorithm.
+    """
+
+    def __init__(self, graph):
+        super().__init__(graph)
+
+    def next_node(self):
+        return random.choice(list(self.graph.neighbors(self.current_node)))
+
+
+class quantum_walk(walk):
+    """Quantum random walk algorithm.
+    """
+
+    def __init__(self, graph):
+        super().__init__(graph)
+
+    def next_node(self):
+        return random.choice(list(self.graph.neighbors(self.current_node)))
+
+
+class groundtruth:
+    """Groundtruth class for the random walk algorithms.
+    """
+
+    def __init__(self) -> None:
+        pass