Use const.

lib/examples/LoLShield_BasicTest/LoLShield_BasicTest.pde

@@ -33,7 +33,7 @@
                            //Initialized in setup.
 
 //Sets the time each frame is shown (milliseconds)
-unsigned int blinkdelay = 1000 / 50;
+const unsigned int blinkdelay = 1000 / 50;
 
 /*
 The BitMap array is what contains the frame data. Each line is one full frame.

lib/examples/LoLShield_Breathe/LoLShield_Breathe.pde

@@ -22,10 +22,10 @@
 
 #include "Charliplexing.h"
 
-unsigned int inhale_time_ms  = 500;
-unsigned int hold_breath_ms  = 600;
-unsigned int exhale_time_ms  = 800;
-unsigned int pause_breath_ms = 2000;
+const unsigned int inhale_time_ms  = 500;
+const unsigned int hold_breath_ms  = 600;
+const unsigned int exhale_time_ms  = 800;
+const unsigned int pause_breath_ms = 2000;
 
 void setup()                    // run once, when the sketch starts
 {

lib/examples/LoLShield_DoubleHelix/LoLShield_DoubleHelix.ino

@@ -20,23 +20,23 @@
 // You can tweak these values to create a custom DNA molecule :)
 //
 
-float stretch = 0.44;           // The width of each sine wave. Smaller values create wider sine waves. I like 0.44 .
+const float stretch = 0.44;           // The width of each sine wave. Smaller values create wider sine waves. I like 0.44 .
 
-float phaseIncrement = 0.1;     // How fast the sines move. I like 0.1 .
+const float phaseIncrement = 0.1;     // How fast the sines move. I like 0.1 .
 
 // The phase of the "darker" sine wave will drift (relative to the "lighter" sine wave).
 // This makes the DoubleHelix more organic/hypnotic .
-float driftIncrement = 0.019;   // The speed it drifts back and forth. Larger == faster. I like 0.019 .
-float driftForce = 0.4;         // The visual amount of drift. I like 0.4 .
+const float driftIncrement = 0.019;   // The speed it drifts back and forth. Larger == faster. I like 0.019 .
+const float driftForce = 0.4;         // The visual amount of drift. I like 0.4 .
 
 // On every other column, light the LEDs between the sine waves, resembling the nucleotides of a DNA molecule.
 // This looks good if we switch between lighting odd columns, then even columns -- the molecule appears to be moving.
-float barPhaseIncrement = 0.09; // Bar movement speed. Plz use values between 0..1 . I like 0.09 .
+const float barPhaseIncrement = 0.09; // Bar movement speed. Plz use values between 0..1 . I like 0.09 .
 
 // Brightness values. Range is 0..7
-byte lightSineBrightness = 7;
-byte darkSineBrightness = 3;
-byte barBrightness = 1;
+const byte lightSineBrightness = 7;
+const byte darkSineBrightness = 3;
+const byte barBrightness = 1;
 
 // (End tweak section)
 /////////////////////////////////////////////////////////////////////////////

lib/examples/LoLShield_FadeTest/LoLShield_FadeTest.pde

@@ -25,13 +25,13 @@
 #include "Charliplexing.h"
 
 // Screen "refresh"
-unsigned int fps = 40;
-unsigned int fps_ms = 1000 / fps;
+const unsigned int fps = 40;
+const unsigned int fps_ms = 1000 / fps;
 
 unsigned int frames = 0;
 
 // number of frames to wait before advance animation
-unsigned int frames_per_step = 10;
+const unsigned int frames_per_step = 10;
 
 void setup()                    // run once, when the sketch starts
 {
@@ -41,7 +41,7 @@ void setup()                    // run once, when the sketch starts
 uint8_t i = 0; 
 void loop()                     // run over and over again
 { 
-  static unsigned long start = 0;
+  unsigned long start = 0;
   unsigned long end;
 
   for (int row = 0; row < DISPLAY_ROWS; row++)

lib/examples/LoLShield_Life/LoLShield_Life.pde

@@ -36,7 +36,7 @@
 #define SIZEX DISPLAY_COLS    //Sets the X axis size
 #define SIZEY DISPLAY_ROWS    //Sets the Y axis size
 byte world[2][SIZEX][SIZEY];  //Creates a double buffer world
-long density = 50;            //Sets density % during seeding
+const int density = 50;       //Sets density % during seeding
 int geck = 0;                 //Counter for re-seeding
 
 void setup() {

lib/examples/LoLShield_Pong/LoLShield_Pong.pde

@@ -15,7 +15,7 @@
 /* ---------------------------------------------------------------------------*/
 /** The figures from 0 to 9 encoded in 7 lines of 5 bits :
  */
-uint16_t figures[][7] = { 
+const uint16_t figures[][7] = { 
 {14,17,17,17,17,17,14},
 {4,6,4,4,4,4,14},
 {14,17,16,14,1,1,31},