Hi. Use this.
<div class="pix-contact-form pix-round" >
<div class="col-md-12">
<div class="form-group">
[text* your-name placeholder "Name"]
</div>
</div>
<div class="col-md-12">
<div class="form-group">
[text* your-phone placeholder "Phone or Skype"]
</div>
</div>
<div class="col-md-12">
[textarea your-message placeholder "Message"]
</div>
<div class="col-md-12 text-left">
[submit class:pix-button class:pix-dark class:pix-v-l "Send message"]
</div>
</div>