button1 {
border: 2px solid black; background: lavender; margin: 1px; padding: 3px;
}
button1:hover {
transition: 8000ms linear; background-color: lightblue;
}
.bblack1 { border: 1px solid black; } .bblack2 { border: 2px solid black; } .bblack3 { border: 3px solid black; }