.intro-background-image-1 {
    background-image: url('../images/intro_background_image_1.png')
}

.intro-background-image-2 {
    background-image: url('../images/intro_background_image_2.png')
}

.intro-background-image-3 {
    background-image: url('../images/intro_background_image_3.png')
}

.education-institution-avatar-image-url {
    background-image: url('../images/education_institution_avatar_image_url.jpg')
  }

  .education-background-image-url {
    background-image: url('../images/education_background_image_url.jpg')
  }

  .avatar-image-url {
    background-image: url('../images/avatar_image_url.png');
  }