.alert-primary
.alert-secondary
.alert-success
.alert-danger
.alert-warning
.alert-info
.alert-light
.alert-dark
.alert-primary a.alert-link
.alert-secondary a.alert-link
.alert-success a.alert-link
.alert-danger a.alert-link
.alert-warning a.alert-link
.alert-info a.alert-link
.alert-light a.alert-link
.alert-dark a.alert-link

.alert-heading

paragraph paragraph paragraph paragraph paragraph paragraph paragraph paragraph paragraph
paragraph paragraph paragraph paragraph paragraph paragraphparagraph　paragraph　paragraph

If you click the button on rightside, close this window.