Final hilbert tweaks

hilbert/section1.py

@@ -947,7 +947,7 @@ class HilbertBetterThanSnakeQ(Scene):
 
 class ImagineItWorks(Scene):
     def construct(self):
-        self.add(TextMobject("Image your project succeeds..."))
+        self.add(TextMobject("Imagine your project succeeds..."))
         self.dither()
 
 

hilbert/section2.py

@@ -1037,6 +1037,57 @@ class TilingSpace(Scene):
             rate_func = None,
             run_time = 15
         ))
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+class ColorIntervals(Scene):
+    def construct(self):
+        number_line = NumberLine(
+            numerical_radius = 5,
+            number_at_center = 5,
+            leftmost_tick = 0,
+            density = 2*DEFAULT_POINT_DENSITY_1D
+        )
+        number_line.shift(2*RIGHT)
+        number_line.add_numbers()
+        number_line.scale(2)
+        brace = Brace(Mobject(
+            *number_line.sub_mobjects[:2]
+        ))
+
+        self.add(number_line)
+        for n in range(0, 10, 2):
+            if n == 0:
+                brace_anim = GrowFromCenter(brace)
+            else:
+                brace_anim = ApplyMethod(brace.shift, 2*RIGHT)
+            self.play(
+                ApplyMethod(
+                    number_line.highlight,
+                    RED,
+                    lambda p : p[0] > n-6.2 and p[0] < n-4 and p[1] > -0.4
+                ),
+                brace_anim
+            )
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