diff --git a/func.c b/func.c
new file mode 100644
index 0000000..0628ac1
--- /dev/null
+++ b/func.c
@@ -0,0 +1,72 @@
+/*
+* delay.c
+*
+* Created: 03.06.2023 12:34:55
+*  Author: Admin
+*/
+#include "func.h"
+
+void delay() {
+	for(volatile long i = 0; i < 1000; i++){};
+}
+
+int count_digits(long number) {
+	int count = 0;
+
+	if (number == 0) {
+		return 1;
+	}
+
+	if (number < 0) {
+		number = -number;
+	}
+
+	while (number > 0) {
+		number /= 10;
+		count++;
+	}
+
+	return count;
+}
+
+void split_digits(long number, int* digits, int size) {
+	int digit;
+	int index = 0;
+
+	if (number == 0) {
+		digits[0] = 0;
+		return;
+	}
+
+	if (number < 0) {
+		number = -number;
+	}
+
+	while (number > 0 && index < size) {
+		digit = number % 10;
+		digits[index] = digit;
+		number /= 10;
+		index++;
+	}
+}
+
+static char map(int digit) {
+	if (digit >= 0 && digit <= 9)
+	return digit + 0x09;
+	else
+	return 0x01;
+}
+
+void map_digits(char* arr, int *digits, int size) {
+	int idx = 0;
+	for (int i = size - 1; i >= 0; i--) {
+		arr[idx] = map(digits[i]);
+		idx++;
+	}
+}
+
+void prepare_data(char *arr, int number, int size) {
+	int digits[size];
+	split_digits(number, digits, size);
+	map_digits(arr, digits, size);
+}
\ No newline at end of file
diff --git a/func.h b/func.h
new file mode 100644
index 0000000..b33bbb5
--- /dev/null
+++ b/func.h
@@ -0,0 +1,13 @@
+/*
+* delay.h
+*
+* Created: 03.06.2023 12:35:06
+*  Author: Admin
+*/
+
+void delay();
+
+void split_digits(long number, int* digits, int size);
+int count_digits(long number);
+void map_digits(char* arr, int *digits, int size);
+void prepare_data(char *arr, int number, int size);