1. Firstly, click on Template from the menu and select Simple layout and Apply to Blog.
2. From blogger admin, click on Template > Edit HTML from the menu and search for the following code:
</b:section>
Until you've found the code that has class='header':
3. Add the following code after you've found the code above (Add after </b:section>) (Also, change the images link to your own images as highlighted in red below):
<div class='off-canvas-wrap'>
<div class='desktop_head'>
<img class='animated_logo go' src='https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEhu_YHA3InIHNE-ozeTyeZMHKxIw9OhtUUm-T79lEZtvErCmcnZTpmBcULivOj7QpcfMHNdLRSWWwMj1d4u5a0MzWaWsjPJQbMkp7FJ3wcKH-oPg3mlXpgusTi8U3ceDeujc851DJO_Ggb1/s1600/cupid.png'/>
<img src='https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEgyHQt_DPhQJVyCApjrsQ5dRDxvqI43EgguWJoNyXv7SfzwYouCVBKWwI8rvpIrjtEcCE0B2ySz54S75UFis5Sq5y50GMvzy7KiBWFG-G0Wy4a_LLH9skyU4jbXbCWqL7hanYZz5gjwboKU/s1600/bg-text.jpg'/></div>
<div class='mobile_head'></div>
</div>