Hi
When you edit such modules would be better to disable default editor
Then you are missing the <i class="introducing-icon2"> and <i class="introducing-icon3"> near the <div class="block-img"> for second and third block
To change images you should edit template .css
.introducing .block-img i {
background-image: url(../images/intro-icons.png);
background-repeat: no-repeat;
display: block;
height: 120px;
margin: 0 auto;
text-indent: -999em;
width: 120px;
}
.introducing-icon1 {
background-position: 0px 0px;
}
.introducing-icon2 {
background-position: -120px 0px;
}
.introducing-icon3 {
background-position: -240px 0px;
}
.introducing .block-title {
font-size: 18px;
}
You can add customizations in custom.css too