diff --git a/examples/CMakeLists.txt b/examples/CMakeLists.txt
index f85f583..c8c0fa7 100644
--- a/examples/CMakeLists.txt
+++ b/examples/CMakeLists.txt
@@ -1,30 +1,30 @@
-#add_subdirectory(vga_ants)
+add_subdirectory(vga_ants)
 add_subdirectory(vga_balloons)
-#add_subdirectory(vga_draw)
-#add_subdirectory(vga_earth)
-#add_subdirectory(vga_eggs)
-#add_subdirectory(vga_fifteen)
-#add_subdirectory(vga_flag)
-#add_subdirectory(vga_ghostracing)
-#add_subdirectory(vga_gingerhouse)
+add_subdirectory(vga_draw)
+add_subdirectory(vga_earth)
+add_subdirectory(vga_eggs)
+add_subdirectory(vga_fifteen)
+add_subdirectory(vga_flag)
+add_subdirectory(vga_ghostracing)
+add_subdirectory(vga_gingerhouse)
 add_subdirectory(vga_hello)
-#add_subdirectory(vga_hypno)
-#add_subdirectory(vga_levelmeter)
-#add_subdirectory(vga_life)
-#add_subdirectory(vga_lines)
-#add_subdirectory(vga_mandelbrot)
-#add_subdirectory(vga_matrixrain)
-#add_subdirectory(vga_maze)
-#add_subdirectory(vga_monoscope)
-#add_subdirectory(vga_oscilloscope)
-#add_subdirectory(vga_pacman)
-#add_subdirectory(vga_pi)
-#add_subdirectory(vga_pixels)
-#add_subdirectory(vga_raytrace)
-#add_subdirectory(vga_sokoban)
-#add_subdirectory(vga_spheres)
-#add_subdirectory(vga_spots)
-#add_subdirectory(vga_tetris)
-#add_subdirectory(vga_train)
-#add_subdirectory(vga_twister)
-#add_subdirectory(vga_watersurface)
+add_subdirectory(vga_hypno)
+add_subdirectory(vga_levelmeter)
+add_subdirectory(vga_life)
+add_subdirectory(vga_lines)
+add_subdirectory(vga_mandelbrot)
+add_subdirectory(vga_matrixrain)
+add_subdirectory(vga_maze)
+add_subdirectory(vga_monoscope)
+add_subdirectory(vga_oscilloscope)
+add_subdirectory(vga_pacman)
+add_subdirectory(vga_pi)
+add_subdirectory(vga_pixels)
+add_subdirectory(vga_raytrace)
+add_subdirectory(vga_sokoban)
+add_subdirectory(vga_spheres)
+add_subdirectory(vga_spots)
+add_subdirectory(vga_tetris)
+add_subdirectory(vga_train)
+add_subdirectory(vga_twister)
+add_subdirectory(vga_watersurface)
diff --git a/examples/vga_draw/src/main.cpp b/examples/vga_draw/src/main.cpp
index 23a9994..23c42fd 100644
--- a/examples/vga_draw/src/main.cpp
+++ b/examples/vga_draw/src/main.cpp
@@ -7,6 +7,7 @@
 
 #include "main.h"
 #include <string.h>
+#include <hardware/clocks.h>
 
 // Draw box
 #if FORMAT==CANVAS_PLANE2
diff --git a/examples/vga_ghostracing/src/main.cpp b/examples/vga_ghostracing/src/main.cpp
index 2ef3824..e1c8c8f 100644
--- a/examples/vga_ghostracing/src/main.cpp
+++ b/examples/vga_ghostracing/src/main.cpp
@@ -8,6 +8,7 @@
 #include "main.h"
 #include "pico/printf.h"
 #include <string.h>
+#include <hardware/clocks.h>
 
 u8 Text[TEXTMAX]; // row of text
 ALIGNED u8 TextCol[TEXTMAX*8]; // text color gradient
diff --git a/examples/vga_hypno/src/main.cpp b/examples/vga_hypno/src/main.cpp
index 8b7b976..d7e230b 100644
--- a/examples/vga_hypno/src/main.cpp
+++ b/examples/vga_hypno/src/main.cpp
@@ -13,6 +13,7 @@
 // crash on hardfault.
 
 #include "main.h"
+#include <hardware/clocks.h>
 
 // draw box
 ALIGNED u8 Box[IMGW*IMGH];
diff --git a/examples/vga_levelmeter/src/main.cpp b/examples/vga_levelmeter/src/main.cpp
index 04d3466..8eb01a8 100644
--- a/examples/vga_levelmeter/src/main.cpp
+++ b/examples/vga_levelmeter/src/main.cpp
@@ -7,6 +7,7 @@
 
 #include "main.h"
 #include <string.h>
+#include <hardware/clocks.h>
 
 // copy of images
 ALIGNED u8 Repro1Img_Copy[sizeof(Repro1Img)];
diff --git a/examples/vga_mandelbrot/src/main.cpp b/examples/vga_mandelbrot/src/main.cpp
index 8b8ac1f..924c635 100644
--- a/examples/vga_mandelbrot/src/main.cpp
+++ b/examples/vga_mandelbrot/src/main.cpp
@@ -32,6 +32,7 @@ We will use 32-bit integer with highest 7 bits as integer part and 25 lower bits
 #include "fixed.h"
 #include "pico/printf.h"
 #include <string.h>
+#include <hardware/clocks.h>
 
 #define USE_INT	0	// use integer arithmetics
 #define USE_FLT	1	// use float arithmetics
diff --git a/examples/vga_matrixrain/src/main.cpp b/examples/vga_matrixrain/src/main.cpp
index bfa295c..68bd393 100644
--- a/examples/vga_matrixrain/src/main.cpp
+++ b/examples/vga_matrixrain/src/main.cpp
@@ -7,6 +7,7 @@
 
 #include "main.h"
 #include <string.h>
+#include <hardware/clocks.h>
 
 #define DELAY		10	// delay in [ms]
 #define LEN_MIN	 	10	// minimal length of drop
diff --git a/examples/vga_oscilloscope/src/main.cpp b/examples/vga_oscilloscope/src/main.cpp
index 2660084..25d89b3 100644
--- a/examples/vga_oscilloscope/src/main.cpp
+++ b/examples/vga_oscilloscope/src/main.cpp
@@ -7,6 +7,7 @@
 
 #include "main.h"
 #include <string.h>
+#include <hardware/clocks.h>
 
 
 // copy of images
diff --git a/examples/vga_pacman/src/main.cpp b/examples/vga_pacman/src/main.cpp
index 33952b8..24bf0fb 100644
--- a/examples/vga_pacman/src/main.cpp
+++ b/examples/vga_pacman/src/main.cpp
@@ -13,6 +13,7 @@
 #include "open.h"		// open screen
 #include "pico/printf.h"
 #include <string.h>
+#include <hardware/clocks.h>
 
 // initialize buffers on program start
 void BufInit()
diff --git a/examples/vga_sokoban/src/main.cpp b/examples/vga_sokoban/src/main.cpp
index 552ed72..750f5d4 100644
--- a/examples/vga_sokoban/src/main.cpp
+++ b/examples/vga_sokoban/src/main.cpp
@@ -13,6 +13,7 @@
 #include <string.h>
 #include "pico/printf.h"
 #include "hardware/sync.h"
+#include <hardware/clocks.h>
 
 // copy of tiles images
 ALIGNED u8 TilesImg_Copy[sizeof(Tiles32Img)];
diff --git a/examples/vga_train/src/main.cpp b/examples/vga_train/src/main.cpp
index 9a78946..57dc939 100644
--- a/examples/vga_train/src/main.cpp
+++ b/examples/vga_train/src/main.cpp
@@ -10,6 +10,7 @@
 #include "levels.h"		// game levels
 #include <string.h>
 #include "pico/printf.h"
+#include <hardware/clocks.h>
 
 u8 Text[TEXTMAX*2]; // 2 rows of text (2nd row is empty, it is used to center line vertically)
 u8 TextCol[TEXTMAX*2*8] __attribute__ ((aligned(4))); // text color gradient
diff --git a/examples/vga_twister/src/main.cpp b/examples/vga_twister/src/main.cpp
index 9e5416f..3e4c648 100644
--- a/examples/vga_twister/src/main.cpp
+++ b/examples/vga_twister/src/main.cpp
@@ -7,6 +7,7 @@
 
 #include "main.h"
 #include <string.h>
+#include <hardware/clocks.h>
 
 // Draw box
 ALIGNED u8 Box[WIDTHBYTE*HEIGHT];