diff --git a/parabeltest.py b/parabeltest.py
index 6d5040a..2dd17ec 100755
--- a/parabeltest.py
+++ b/parabeltest.py
@@ -37,20 +37,26 @@ clear, home, curoff, curon = "'\x1b[2J\x1b[H", "\x1b[H", "\x1b[?25l", "\x1b[?25h
 xsteps = xmax
 x = 0
 y = x**2
-starthoehe = 0
-startwinkel = 45
-startgeschwindigkeit = 23
 erde = 9.81
 mond = 1.6
 jupiter = 24
 gravitation = erde
+# in scala the resulting coordinates will be returned
+scala = []
 
+# used, if input is disabled
+starthoehe = 0
+startwinkel = 26
+startgeschwindigkeit = 23
+loeschen = "n"
 
-#########################
-starthoehe = float(input("Starthöhe: "))
-startwinkel = float(input("Startwinkel: ")) * deg2rad
-startgeschwindigkeit = float(input("Startgeschwindigkeit: "))
-
+# Be a friendly host, lets have a talk.
+# comment out to speed up testing
+starthoehe = float(input("Starthöhe in Metern, empf: 0-20: "))
+startwinkel = float(input("Startwinkel 0° - 90°: ")) * deg2rad
+startgeschwindigkeit = float(input("Startgeschwindigkeit Meter (zb 20) pro Sekunde: "))
+loeschen = input("Kuh löschen? (y/n)")
+####
 
 # Calculate time of flight
 flugdauer = startgeschwindigkeit * sin(startwinkel) / gravitation
@@ -75,31 +81,38 @@ print(
     "\nwurfweite: ",
     wurfweite,
     "\nstartwinkel: ",
-    startwinkel,
+    startwinkel / deg2rad,
     "\nstartgeschwindigkeit: ",
     startgeschwindigkeit,
-    "\nstarthroehe: ",
+    "\nstarthoehe: ",
     starthoehe,
-    "hoehe: ",
+    "\nhoehe: ",
     hoehe,
 )
 
-a = input("CR please:")
+bla = input("CR please:")
 
 # position cursor down left corner
 curpos(1, ymax)
 
-# cowlenght ist 2, is cow is an UTF8-Icon, otherwise 1
+# cowlength is 2, if cow is an UTF8-Icon, otherwise 1
 for x in range(1, xsteps, cowlength):
-    # the formula, which genereates the y position for the corresponding x
+    # the formula, which generates the y position for the corresponding x, shamelessly ripped from some schoolbook and modified.
+    yold = y
     y = (-(gravitation / (2 * startgeschwindigkeit**2 * cos(startwinkel) ** 2)) * x**2) + (tan(startwinkel) * x + starthoehe)
 
     # Ensure, that nothing has to be drawn outside the viewport
     if y < ymax and y > ymin:
         curpos(x, y)
         print(cow, end="")
-        time.sleep(0.01)
+        # Stash awa the coordinates into scala, which will be returned
+        scala += [x, int(y * 10 + 5) / 10]
+        time.sleep(0.03)
+        if loeschen == "y":
+            curpos(x - 2, yold)
+            print("  ", end="")
 
 
-curpos(1, 1)
+curpos(0, 0)
+# print(scala)
 sys.exit(curon + "Moooooooooooo.")