diff --git a/STEP1_Basics/4_Double_array/main.c b/STEP1_Basics/4_Double_array/main.c
new file mode 100644
index 0000000..505fe77
--- /dev/null
+++ b/STEP1_Basics/4_Double_array/main.c
@@ -0,0 +1,36 @@
+#include <stdio.h>
+
+int main() {
+	int matrix[10][10];
+
+	for (int x = 0; x < 10; x++) {
+		for (int y = 0; y < 10; y++) {
+			matrix[x][y] = 0;
+		}
+	}
+
+	for (int x = 0; x < 10; x++) {
+		matrix[x][0] = x;
+	}
+	for (int y = 0; y < 10; y++) {
+		matrix[0][y] = y;
+	}
+
+	for (int x = 0; x < 10; x++) {
+		for (int y = 0; y < 10; y++) {
+			matrix[x][y] = x * y;
+		}
+	}
+
+	for (int x = 0; x < 10; x++) {
+		for (int y = 0; y < 10; y++) {
+			if (matrix[x][y] > 9) {
+				printf("%d ", matrix[x][y]);	
+			}
+			else {
+				printf("%d  ", matrix[x][y]);
+			}
+		}
+		printf("\n");
+	}
+}