diff --git a/28/main.py b/28/main.py
new file mode 100644
index 0000000..1851ccc
--- /dev/null
+++ b/28/main.py
@@ -0,0 +1,31 @@
+# Number spiral diagonals
+
+# Find the sum of the numbers on the diagonals of a 1001 by 1001 spiral
+
+
+
+def sumSpiralDiagonals(n):
+	assert n % 2 == 1
+
+	if n == 1:
+		return 1
+
+	result = 0
+	corner = 1
+	for i in range(1, n+1, 2):
+		if i == 1:
+			result += corner
+		else:
+			for j in range(4):
+				corner += i - 1
+				result += corner
+
+	return result
+
+def main():
+	print("Hello, this is Patrick")
+
+	print(sumSpiralDiagonals(1001))
+
+if __name__ == "__main__":
+	main()
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