diff --git a/firmware/l0dable/matrix.c b/firmware/l0dable/matrix.c
new file mode 100644
index 0000000..c62d872
--- /dev/null
+++ b/firmware/l0dable/matrix.c
@@ -0,0 +1,62 @@
+#include <sysinit.h>
+
+#include "basic/basic.h"
+#include "lcd/render.h"
+
+#include "usetable.h"
+
+#define SCREEN_WIDTH 12
+#define SCREEN_HEIGHT 8
+#define INVALID_POS 127
+
+#define FONT_WIDTH 7
+#define FONT_HEIGHT 8
+
+#define MATRIX_LINES_LENGTH 15
+
+#define MAX_LINE_LENGTH 6
+
+void ram(void){
+	lcdClear();
+
+	struct matrix_line {
+		int head_x, head_y;
+		int cur_length;
+		int length;
+	} matrix_lines[MATRIX_LINES_LENGTH];
+
+	for (int i = 0; i < MATRIX_LINES_LENGTH; i++) {
+		matrix_lines[i].cur_length = -1;
+	}
+
+	while (1) {
+		for(int i = 0; i<MATRIX_LINES_LENGTH; i++) {
+			struct matrix_line *ml = matrix_lines + i;
+			// new tail
+			if (ml->cur_length == -1) {
+				ml->head_x = getRandom() % SCREEN_WIDTH;
+				ml->head_y = getRandom() % SCREEN_HEIGHT - 1;
+				ml->length = getRandom() % MAX_LINE_LENGTH + 3;
+				ml->cur_length = 0;
+			}
+			// new char
+			if (ml->head_y < SCREEN_HEIGHT-1) {
+				ml->head_y++;
+				int chr = getRandom() % 95 + 33;
+				DoChar(ml->head_x * FONT_WIDTH, ml->head_y * FONT_HEIGHT, chr);
+				ml->cur_length++;
+			}
+			// remove chars (when length or bottom is reached)
+			if (ml->cur_length > ml->length || ml->head_y >= SCREEN_HEIGHT-1) {
+				DoChar(ml->head_x * FONT_WIDTH, (ml->head_y - ml->cur_length) * FONT_HEIGHT, ' ');
+				ml->cur_length--;
+			}
+		}
+		lcdDisplay();
+		// Exit on enter+left
+		int key = getInputRaw();
+		if(key== BTN_ENTER || key == BTN_LEFT)
+			return;
+		delayms(60);
+	};
+};