diff --git a/d10/part1.awk b/d10/part1.awk
new file mode 100644
index 0000000..302fa7d
--- /dev/null
+++ b/d10/part1.awk
@@ -0,0 +1,13 @@
+BEGIN { x=1 }
+function inc() {
+	c+=1
+	if (index("20,60,100,140,180,220,", c ",")>0) {
+		S += x*c
+	}
+}
+{ inc() }
+$1 == "addx" {
+	inc()
+	x+=$2
+}
+END { print S }
\ No newline at end of file