Here's how to apply:
First, go to blogger> Template> Edit HTML> Apply CSS code below before </style>or ]]></b:skin>and for jQuery code apply before</body>
#flippy {
text-align: center;
}
#flippy button {
background: #aa65c7;
color: #fff;
text-align: center;
margin: 0 auto;
border: none;
border-radius: 3px;
padding: 8px 16px;
margin: 10px auto;
font-size: 14px;
font-weight: bold;
box-shadow: 0px 3px 0px 0px #883da7;
vertical-align: middle;
cursor: pointer;
text-shadow: 0 1px rgba(0, 0, 0, 0.3);
transition: background 0.1s ease-in-out;
}
#flippy button:hover, #flippy button:focus {
background: #9e4fbf;
outline: none;
}
#flippanel {
padding: 1px;
text-align: left;
background: #f5f5f5;
border: 0px;
}
#flippanel {
padding: 24px;
display: none;
}
<script>
$(document).ready(function() {
$("#flippy").click(function() {
$("#flippanel").slideToggle("normal");
});
});
</script>
Then apply the code below in the tab posting HTML
<div id="flippy"><button>Cekidot</button></div>
<div id="flippanel">
---YOUR CONTENT APPLIES HERE---
</div>
So for tips, this time, may be useful.