Forgot the function

1 - Code/hl3.py

@@ -45,8 +45,7 @@ class color:
 def col(r, g, b):
     return (r, g, b)
 
-class matrix:
-    def clear(color):
+def color_convert(color):
     
     # Handle hex an 0
     if isinstance(color, int):
@@ -61,7 +60,35 @@ class matrix:
     else:
         raise ValueError("Color must be an RGB tuple, a hex value, 0 or a valide color from the color class")
     
+    return color
+
+class matrix:
+    
+    def clear(color):
+        
+        # Convert the color
+        color = color_convert(color)
+        
+        # Set the full screen to the color
         for i in range(nb_line*nb_row):
             np[i] = color
         
+        # Apply the array
         np.write()
+    
+    def set_line(line, color):
+        
+        # Check line
+        if line < 0 or line >= nb_line:
+            raise ValueError("Line is out of bound")
+        
+        # Convert the color
+        color = color_convert(color)
+        
+        # Set the line to the color
+        for i in range(line*nb_row, (line*nb_row)+nb_row):
+            np[i] = color
+        
+        # Apply the array
+        np.write()
+

1 - Code/main.py

-from hl3 import color
-from hl3 import matrix
+from hl3 import *
 
-matrix.clear(color.RED)
+matrix.clear(0)
+matrix.set_line(5, color.RED)