diff --git a/2023/day09/example1.txt b/2023/day09/example1.txt
new file mode 100644
index 0000000..70c5595
--- /dev/null
+++ b/2023/day09/example1.txt
@@ -0,0 +1,3 @@
+0 3 6 9 12 15
+1 3 6 10 15 21
+10 13 16 21 30 45
\ No newline at end of file
diff --git a/2023/day09/src/part1.py b/2023/day09/src/part1.py
new file mode 100644
index 0000000..a17caea
--- /dev/null
+++ b/2023/day09/src/part1.py
@@ -0,0 +1,32 @@
+text: str = open("input.txt", "r").read()
+
+_value: int = 0 
+
+lines = text.splitlines()
+
+def get_difference(values: [int]):
+	lst = []
+	for i in range(0, len(values) - 1):
+		lst.append(values[i + 1] - values[i])
+	return lst
+
+def get_next(derives: [[int]]):
+	value = 0
+	for values in derives[::-1]:
+		if (len(values) == 0):
+			continue
+		value = values[-1] + value
+	return value
+
+for line in lines:
+	values = list(map(int, line.split()))
+	derives: [[int]] = [values]
+	lst = values
+	while True:
+		lst = get_difference(lst)
+		derives.append(lst)
+		if (lst.count(0) == len(lst)):
+			break
+	_value += get_next(derives)
+
+print(_value)
\ No newline at end of file