seedling tray generation script

flower_pot.py

@@ -5,24 +5,14 @@ import subprocess
 import sys
 from pathlib import Path
 
+from utils import ask_float
+
 
 BASE_DIR = Path(__file__).resolve().parent
 SCAD_DIR = BASE_DIR / "flower_pot"
 OUT_DIR = BASE_DIR / "stl"
 
 
-def ask_float(prompt: str) -> float:
-    while True:
-        try:
-            value = float(input(prompt).strip())
-            if value <= 0:
-                print("Please enter a positive number.")
-                continue
-            return value
-        except ValueError:
-            print("Please enter a valid number.")
-
-
 def render_scad(scad_file: Path, out_file: Path, base_radius: float, wall_height: float, wall_height_tray: float) -> None:
     cmd = (
         f'openscad '