diff --git a/d10/part1.awk b/d10/part1.awk
new file mode 100644
index 0000000..d5f0ff1
--- /dev/null
+++ b/d10/part1.awk
@@ -0,0 +1,11 @@
+BEGIN { x=1 }
+function inc() {
+	c+=1
+	S += index("20,60,100,140,180,220,", c ",")>0 ? x*c : 0
+}
+{ inc() }
+$1 == "addx" {
+	inc()
+	x+=$2
+}
+END { print S }
\ No newline at end of file