diff --git a/.vscode/settings.json b/.vscode/settings.json
new file mode 100644
index 0000000..c9aa996
--- /dev/null
+++ b/.vscode/settings.json
@@ -0,0 +1,12 @@
+
+{
+    "terminal.integrated.env.osx": {
+      "PYTHONPATH": "${workspaceFolder}/src",
+    },
+    "terminal.integrated.env.linux": {
+      "PYTHONPATH": "${workspaceFolder}/src",
+    },
+    "terminal.integrated.env.windows": {
+      "PYTHONPATH": "${workspaceFolder}/src",
+    }
+  }
\ No newline at end of file
diff --git a/src/main.py b/src/main.py
new file mode 100644
index 0000000..3fd6bcc
--- /dev/null
+++ b/src/main.py
@@ -0,0 +1,34 @@
+
+import os
+from shutil import disk_usage
+import time
+
+BS = 1024**2
+
+def set_utilization(du, utilization_percent=0.6, baloon_filename='baloon'):
+    fs = os.path.realpath(du)
+    du = disk_usage(fs)
+    print(f'total: {int(du.total/ 2**30)}GB, used: {int(du.used/ 2**30)}GB, free: {int(du.free/ 2**30)}GB')
+    to_be_wasted = int((du.total * utilization_percent) - du.used)
+    print(f'to_be_wasted: {int(to_be_wasted/ 2**30)}GB')
+    if to_be_wasted < 0:
+        to_be_trimmed = abs(to_be_wasted)
+        baloon_size = os.path.getsize(os.path.join(fs, baloon_filename))
+        if  baloon_size> to_be_trimmed:
+            os.truncate(os.path.join(fs, baloon_filename), baloon_size - to_be_trimmed)
+        else: print(f'can\'t trim {baloon_size} > {to_be_trimmed}')
+    elif to_be_wasted > 0:
+        with open(os.path.join(fs, baloon_filename) , 'ab') as f:
+            last = 0
+            while to_be_wasted > 0:
+                if time.time() - last > 1:
+                    print('\r', end='')
+                    print(f'left {int(to_be_wasted/ 2**30)}GB                    ', end='')
+                    last = time.time()                          
+                write_size = min(to_be_wasted, BS)
+                f.write(b'x' * write_size)
+                to_be_wasted -= write_size
+            print('Done               ')
+                
+
+set_utilization('.')
\ No newline at end of file