Add more advanced and remote recipes

docs/examples/bluedot_robot_2.py

@@ -0,0 +1,26 @@
+from gpiozero import Robot
+from bluedot import BlueDot
+from signal import pause
+
+def pos_to_values(x, y):
+    left = y if x > 0 else y + x
+    right = y if x < 0 else y - x
+    return (clamped(left), clamped(right))
+
+def clamped(v):
+    return max(-1, min(1, v))
+
+def drive():
+    while True:
+        if bd.is_pressed:
+            x, y = bd.position.x, bd.position.y
+            yield pos_to_values(x, y)
+        else:
+            yield (0, 0)
+
+robot = Robot(left=(4, 14), right=(17, 18))
+bd = BlueDot()
+
+robot.source = drive()
+
+pause()