diff --git a/econ-demo.py b/econ-demo.py
index e90c7f3..73272ec 100644
--- a/econ-demo.py
+++ b/econ-demo.py
@@ -170,7 +170,7 @@ def calc_total_supply(df):
         total.append(sum(data))
     return total
 
-def draw_specific_chart1(terms=50, linear_label="? (linear)"):
+def draw_apy_inflation(terms=50, linear_label="? (linear)"):
     participants = ["Alice", "Bob", "Charlie"]
     balances = [100,40,20]
 
@@ -194,6 +194,9 @@ def draw_specific_chart1(terms=50, linear_label="? (linear)"):
         exit()
 
     plt.style.use('dark_background')
+    plt.plot(
+        x, total_supply_ubi, color="cyan", label="dividend = 10"
+    )
     plt.plot(
         x, total_supply_si, color="red", label="apy = 0.05"
     )
@@ -223,7 +226,7 @@ def draw_specific_chart1(terms=50, linear_label="? (linear)"):
     plt.close()
     # plt.show()
 
-def draw_specific_chart2(terms=50):
+def draw_3ubi_3apy(terms=50):
     participants = ["Alice", "Bob", "Charlie"]
     balances = [100,40,20]
 
@@ -345,14 +348,7 @@ def visualize_wealth_dist(df, title="Wealth Distribution", filename="wealth-dist
     plt.savefig(filename)
     plt.close()
 
-if __name__ == "__main__":
-
-    illustrate_share_of_wealth()
-    visualize_ubi(terms=50)
-    draw_specific_chart1(terms=75)
-    draw_specific_chart1(terms=75, linear_label="dividend = 10")
-    draw_specific_chart2(terms=75)
-
+def draw_simple_mining_demo():
     participants = ["Alice", "Bob", "Charlie"]
     balances = [100,40,20]
     m = get_balances_over_time(
@@ -364,3 +360,60 @@ if __name__ == "__main__":
     visualize_inflation(m, title="Inflation Given block_reward = 10 and Halving Every Term", filename="inflation-pow.png")
     # print(m.iloc[:,:5].to_markdown())
     visualize_wealth_dist(m, filename="wealth-distribution-pow.png")
+
+class Sim:
+    def __init__(self, players, balances, terms=50):
+        self.players = players
+        self.balances = balances
+        self.terms = terms
+
+        self.events = []
+        pass
+
+    def add_player(self, name="Danny", balance=50):
+        self.players.append(name)
+        self.balances.apend(balance)
+        assert(len(self.players) == len(self.balances))
+
+    def run(self, update, trade = None):
+        i = 0
+        ADD_NEW_PPL_EVERY = 3
+        current_balances = self.balance
+        result = list()
+        while i <= self.terms:
+            # add new player?
+            if ADD_NEW_PPL_EVERY > 0 and i % ADD_NEW_PPL_EVERY == 0:
+                pass
+            new_bal = []
+            # make players trade if an
+            if trade:
+                current_balances = trade(current_balances)
+            for balance in current_balances:
+                b = update(balance)
+                new_bal.append(b)
+            result.append(new_bal)
+            current_balances = new_bal
+        return result
+
+    def visualize(self):
+        pass
+
+def mini_apy(balance, rate=0.05):
+    return balance + (balance * rate)
+
+def mini_ubi(balance, dividend = 10):
+    return balance + dividend
+
+if __name__ == "__main__":
+
+    illustrate_share_of_wealth()
+    visualize_ubi(terms=50)
+    draw_apy_inflation(terms=75)
+    draw_apy_inflation(terms=75, linear_label="dividend = 10")
+    draw_3ubi_3apy(terms=75)
+
+    draw_simple_mining_demo()
+
+    participants = ["Alice", "Bob", "Charlie"]
+    balances = [100,40,20]
+    s = Sim(participants, balances)