diff --git a/DEV.1.1/CM2/CM2A/2.Separation/Makefile b/DEV.1.1/CM2/CM2A/2.Separation/Makefile
new file mode 100644
index 0000000..6a197fb
--- /dev/null
+++ b/DEV.1.1/CM2/CM2A/2.Separation/Makefile
@@ -0,0 +1,16 @@
+carre : carre.o lightness.o
+	gcc -ansi -pedantic -o carre carre.o lightness.o
+
+lightness.o : lightness.c lightness.h
+	gcc -ansi -pedantic -c lightness.c
+
+carre.o : carre.c lightness.h
+	gcc -ansi -pedantic -c carre.c
+
+### REGLES ESSENTIELLES ###
+
+but : carre
+
+### REGLES OPTIONELLES ###
+run : but
+	./carre
\ No newline at end of file
diff --git a/DEV.1.1/CM2/CM2A/2.Separation/carre b/DEV.1.1/CM2/CM2A/2.Separation/carre
new file mode 100755
index 0000000..dd33d6b
Binary files /dev/null and b/DEV.1.1/CM2/CM2A/2.Separation/carre differ
diff --git a/DEV.1.1/CM2/CM2A/2.Separation/carre.c b/DEV.1.1/CM2/CM2A/2.Separation/carre.c
new file mode 100644
index 0000000..557551b
--- /dev/null
+++ b/DEV.1.1/CM2/CM2A/2.Separation/carre.c
@@ -0,0 +1,48 @@
+#include<stdlib.h>
+#include<stdio.h>
+#include<time.h>
+
+#include "lightness.h"
+
+#define LIGHT         0
+#define DARK          1
+#define RED           1
+#define GREEN         2
+#define BLUE          4
+#define DARK_RED    124
+#define DARK_GREEN   34
+#define DARK_BLUE    19
+
+int hue(void) {
+  int choice = rand()%3;
+  if (choice == 0) {
+    return RED;
+  } else if (choice == 1) {
+    return GREEN;
+  } else /* if (choice == 2) */ {
+    return BLUE;
+  }
+}
+
+int main(void) {
+  int l, c, v;
+
+  srand(time(NULL));
+  l = lightness();
+  c = hue();
+
+  if (c == RED) {
+    v = (l == LIGHT) ? LIGHT_RED : DARK_RED;
+  } else if (c == GREEN) {
+    v = (l == LIGHT) ? LIGHT_GREEN : DARK_GREEN;
+  } else /* if (c == BLUE) */ {
+    v = (l == LIGHT) ? LIGHT_BLUE : DARK_BLUE;
+  }
+
+  printf("┏━━━━┓\n");
+  printf("┃\33[48;5;%dm    \33[m┃\n", v);
+  printf("┃\33[48;5;%dm    \33[m┃\n", v);
+  printf("┗━━━━┛\n");
+
+  return EXIT_SUCCESS;
+}
\ No newline at end of file
diff --git a/DEV.1.1/CM2/CM2A/2.Separation/lightness.c b/DEV.1.1/CM2/CM2A/2.Separation/lightness.c
new file mode 100644
index 0000000..e1ead60
--- /dev/null
+++ b/DEV.1.1/CM2/CM2A/2.Separation/lightness.c
@@ -0,0 +1,11 @@
+#include <stdio.h>
+#include <stdlib.h>
+#include "lightness.h"
+
+int lightness(void) {
+  if (time(NULL)%2) {
+    return LIGHT;
+  } else {
+    return DARK;
+  }
+}
diff --git a/DEV.1.1/CM2/CM2A/2.Separation/lightness.h b/DEV.1.1/CM2/CM2A/2.Separation/lightness.h
new file mode 100644
index 0000000..f5bcd91
--- /dev/null
+++ b/DEV.1.1/CM2/CM2A/2.Separation/lightness.h
@@ -0,0 +1,13 @@
+#ifndef LIGHTNESS_H
+#define LIGHTNESS_H
+
+#define LIGHT         0
+#define DARK          1
+#define LIGHT_RED   217
+#define LIGHT_GREEN 157
+#define LIGHT_BLUE  147
+
+int lightness(void);
+
+
+#endif /*LIGHTNESS_H*/
\ No newline at end of file