balls are moving on my screen

tester.py

@@ -0,0 +1,23 @@
+import time
+import numpy as np
+import subprocess
+from pathlib import Path
+
+p = subprocess.Popen(Path("bin", "x64", "Debug", "LivePlotter.exe"), stdin=subprocess.PIPE)
+
+x = 0
+y = 0
+z = 0
+t = 0
+period = 0.1
+while True:
+    time.sleep(period)
+    x = 10*np.cos(t)
+    y = 10*np.sin(t)
+    z = 0
+    t += period
+    p.stdin.write(f"test {x} {y} {z}\n".encode("utf8"))
+    p.stdin.write(f"test2 {x} {-y} {z}\n".encode("utf8"))
+    p.stdin.write(f"test3 {-x} {y} {z}\n".encode("utf8"))
+    p.stdin.write(f"test4 {-x} {-y} {z}\n".encode("utf8"))
+    p.stdin.flush()