diff --git a/Jaslo/sheet6.py b/Jaslo/sheet6.py
index a9123c93b96ac08da623123b09e1374c5ccd6e8f..bd03270e9fd94377c70f96feed0a362148f213e8 100644
--- a/Jaslo/sheet6.py
+++ b/Jaslo/sheet6.py
@@ -5,6 +5,7 @@ import matplotlib.pyplot as plt
 import numpy as np
 from numpy.typing import ArrayLike
 from scipy.constants import Boltzmann as k_B
+from tqdm import tqdm
 
 # Problem 6.1
 # a)
@@ -53,7 +54,7 @@ def verlet_thermostat(
 
     f, U[0] = force(r[0], L)
 
-    for i in range(1, N):
+    for i in tqdm(range(1, N)):
         # first half step
         p[i] = p[i-1] + 1/2 * f * dt
         r[i] = r[i-1] + p[i] / m * dt
@@ -94,7 +95,7 @@ def verlet(
 
     f, U[0] = force(r[0], L)
 
-    for i in range(1, N):
+    for i in tqdm(range(1, N)):
         # first half step
         p[i] = p[i-1] + 1/2 * f * dt
         r[i] = r[i-1] + p[i] / m * dt
@@ -179,7 +180,7 @@ T = 1 / (2 * m0) * np.sum(p**2, axis=(1, 2))
 H = U + T
 dH = H - np.mean(H)
 c_V = np.mean(dH**2) / (N * k_BT**2)
-dc_V = bp.std(dH**2) / (N * k_BT**2)
+dc_V = np.std(dH**2) / (N * k_BT**2)
 print(f"c_V = {c_V} ± {dc_V} k_B")
 
 # c)
@@ -210,5 +211,5 @@ T = 1 / (2 * m0) * np.sum(p**2, axis=(1, 2))
 H = U + T
 dH = H - np.mean(H)
 c_V = np.mean(dH**2) / (N * k_BT**2)
-dc_V = bp.std(dH**2) / (N * k_BT**2)
+dc_V = np.std(dH**2) / (N * k_BT**2)
 print(f"c_V = {c_V} ± {dc_V} k_B")