diff --git a/network_attack_propagation.py b/network_attack_propagation.py
index 658fee9..4410634 100644
--- a/network_attack_propagation.py
+++ b/network_attack_propagation.py
@@ -10,6 +10,7 @@ class Node:
     def __init__(self, is_infected=False):
         self.id = random.randint(1, 2000000)
         self.is_infected = is_infected
+        self.under_attack = False
 
     def as_tuple(self):
         return self.id, self.is_infected
@@ -50,6 +51,11 @@ class Graph:
             nodes.add(edge.node_b)
         return nodes
 
+    def clear_attacked(self) -> None:
+        for edge in self.edges:
+            edge.node_a.under_attack = False
+            edge.node_b.under_attack = False
+
     def get_adjacent_nodes(self, node: Node) -> [(Node, int)]:
         """
         :param node: Node to search for
@@ -84,6 +90,7 @@ class Graph:
             else:
                 to_be_infected = random.choice([n[0] for n in adjacent_nodes])
             to_be_infected.is_infected = True
+            to_be_infected.under_attack = True
         self.update_survived()
 
 
@@ -101,17 +108,23 @@ def update(num, layout, g_repr, ax, our_graph: Graph):
     ax.set_title(f'Step: {num}', loc='right', fontsize=30)
 
     colors = ['red' if n.is_infected else 'blue' for n in g_repr]
-    sizes = [200 if n.is_infected else 50 for n in g_repr]
+    edgecolors = ['black' if n.under_attack else 'none' for n in g_repr]
+    linewidths = [3 if c == 'black' else 0 for c in edgecolors]
+    sizes = [300 if n.is_infected else 150 for n in g_repr]
     nx.draw(
         g_repr,
         ax=ax,
         pos=layout,
         node_color=colors,
+        linewidths=linewidths,
+        edgecolors=edgecolors,
         with_labels=False,
         node_size=sizes,
         alpha=0.7,
     )
 
+    our_graph.clear_attacked()
+
 
 def do_graph_animation(output_file_name: str, in_graph: Graph, frame_count: int, layout):
     g_repr = nx.Graph()