removing some of the classes

src/Infiltration/ui/Countdown.tsx

@@ -1,6 +1,7 @@
 import React, { useState, useEffect } from "react";
 import Grid from "@mui/material/Grid";
 
+import Typography from "@mui/material/Typography";
 interface IProps {
   onFinish: () => void;
 }
@@ -19,8 +20,8 @@ export function Countdown(props: IProps): React.ReactElement {
     <>
       <Grid container spacing={3}>
         <Grid item xs={12}>
-          <h1>Get Ready!</h1>
-          <h1>{x}</h1>
+          <Typography variant="h4">Get Ready!</Typography>
+          <Typography variant="h4">{x}</Typography>
         </Grid>
       </Grid>
     </>