My Caret in Atom

gistfile1.less

/*
 * Go to Settings > Themes > your stylesheet
 */
 
.editor {
    // Slow the blinking of the cursor
    .cursor {
        line-height: @line-height;
        
        // This is for a teminal style block cursor, only any good for dark color schemes
        background: rgba(255,255,255,.3);
        color: transparent;
    }

    // Only override the cursor when the editor is focused
    &.is-focused .cursor {
        -webkit-animation: caret 1200ms infinite;
        visibility: visible!important;
    }
}

@-webkit-keyframes caret
{
    0%   { opacity: 0;}
    25%  { opacity: 1;}
    75%  { opacity: 1;}
    100% { opacity: 0;}
}