diff --git a/II/Referatas/sinewave.py b/II/Referatas/sinewave.py
index 74f1ca5..3f540ee 100755
--- a/II/Referatas/sinewave.py
+++ b/II/Referatas/sinewave.py
@@ -1,19 +1,22 @@
 #!/usr/bin/python
+from math import pi
 from pyproj import CRS
 import numpy as np
 import geopandas as gpd
 from shapely.geometry import LineString
 
-INTERVAL = 0.5
+INTERVAL = 0.1
 TAIL_LEN = 4
 SINE_LEN = 7
 
+TAILS = np.zeros(int(TAIL_LEN / INTERVAL))
+
 
 def main():
-    tails = np.zeros(int(TAIL_LEN / INTERVAL))
-    amplitude = np.sin(np.arange(0, SINE_LEN, INTERVAL))
-    y = np.concatenate([tails, amplitude, tails])
-    x = np.arange(-TAIL_LEN, SINE_LEN+TAIL_LEN, INTERVAL)
+    sin_range = np.arange(-pi/4, SINE_LEN, INTERVAL)
+    amplitude = np.sin(sin_range * pi / 2) + 1
+    y = np.concatenate([TAILS, amplitude, TAILS])
+    x = np.arange(-TAIL_LEN - pi/4, SINE_LEN + TAIL_LEN, INTERVAL)
     geom = LineString(zip(x, y))
     df = gpd.GeoDataFrame(crs=CRS(3346))
     df['geometry'] = None