diff --git a/libraries/deno-commons-mod.ts b/libraries/deno-commons-mod.ts
index bc4d4c2..5d056b1 100644
--- a/libraries/deno-commons-mod.ts
+++ b/libraries/deno-commons-mod.ts
@@ -107,6 +107,18 @@ export function formatPercent(a: number, b: number): string {
     return p.substring(0, pointIndex) + "." + decimalPart + "%";
 }
 
+export async function clearLastLine() {
+    await printLastLine("");
+}
+
+export async function printLastLine(line: string) {
+    await Deno.stdout.write(
+        new TextEncoder().encode(
+            `\x1b[1000D${line}\x1b[K`,
+        ),
+    );
+}
+
 Deno.test("isOn", () => {
     assertEquals(false, isOn(undefined));
     assertEquals(false, isOn(""));