Have a dark mode for jupyter and also integrate notify; which notifies when a command is executed. Not a very sophisticated script.

jupyter_dark_theme_and_notify.js

$("head").append(`<style>
body,

body.notebook_app.command_mode {
    font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", "Helvetica Neue", Helvetica, Arial, sans-serif;
}
.CodeMirror pre,
.CodeMirror-dialog,
.CodeMirror-dialog .CodeMirror-search-field,
.terminal-app .terminal {
    font-family: "Bitstream Vera Sans Mono", Monaco, monospace;
    font-size: 9pt;
}

.terminal-app .terminal {
    line-height: 1.3em;
}

div.output pre,
div.output code,
.rendered_html pre,
.rendered_html code,
div.completions select,
div.container pre {
    font-family: "Bitstream Vera Sans Mono", Monaco, monospace;
}

div.output pre,
div.output code,
.rendered_html pre,
.rendered_html p code,
div.completions select,
div.container pre {
    font-size: 9pt;
}

div.prompt,
div.tooltiptext pre {
    font-family: "Bitstream Vera Sans Mono", Monaco, monospace;
    font-size: 8pt;
}

div.input_area {
    border-color: rgba(0, 0, 0, 0.10);
    background: rbga(0, 0, 0, 0.5);
}


/* GLOBALS */

@media not print {
    body {
        background-color: #eee;
    }
}

a {
    color: #ff585b;
}

a:hover,
a:focus {
    color: rgb(253, 91, 91);
}


/* INTRO PAGE */

body[data-notebook-path] {
    background-color: #222;
}

body[data-notebook-path] #header,
.terminal-app #header {
    display: none !important;
}

.tabbable {
    color: rgb(241, 239, 239);
}

.navbar-default .navbar-nav>li>a {
    color: #e8e8e8;
}

.output_png {
    background: #999;
}

#kernel_indicator {
    color: #e8e8e8;
}

.nav-tabs {
    border-bottom-color: #444;
}

.nav-tabs>li>a:hover,
.nav>li>a:focus {
    background-color: #333;
    border-color: #222 #222 #555 #222;
}

.nav-tabs>li.active>a,
.nav-tabs>li.active>a:focus,
.nav-tabs>li.active>a:hover {
    color: #979797;
    background-color: #444;
    border-top-color: #444;
    border-right-color: #444;
    border-left-color: #444;
}

.list_container {
    border-color: #444;
}

.list_container>div {
    border-bottom-color: #444;
}

.list_item:hover {
    background-color: #333;
}

.list_header {
    background-color: #444;
}

#notebook_list input[type="checkbox"] {
    opacity: 0.3;
}

#notebook_list input[type="checkbox"]:checked {
    opacity: 1;
}

.item_icon {
    color: #777;
}

.panel {
    border-color: #444;
    background-color: #222;
}

.panel-default>.panel-heading {
    border-color: #444;
}

#site .panel-group .panel .panel-heading {
    background-color: #444;
}

#running .panel-group .panel .panel-body .list_container .list_item {
    border-bottom-color: #444;
}


/* Dropdown menus */

.dropdown-menu {
    background: rgba(50, 50, 50, 0.95);
    color: #b7b7b7;
}

.dropdown-menu>li>a,
.dropdown-submenu>a:after,
.dropdown-menu>li>a:visited:after {
    color: #b7b7b7;
}

.dropdown-menu .divider {
    background-color: #444;
}

.dropdown-menu>li>a:hover,
.dropdown-menu>li>a:focus {
    color: #fff;
    background-color: #444;
}

.dropdown-menu>li>a:hover:after,
.dropdown-menu>li>a:focus:after,
.dropdown-menu>li>a:active:after {
    color: #fff;
}


/* TERMINAL INTERFACE */

.terminal-app #site {
    background: #272727;
}

.terminal-app .terminal {
    background: #141414 !important;
}


/* NOTEBOOK AND EDITOR INTERFACE */


/* comment out the following line to unhide the toolbar */

/*
div#maintoolbar {
    display: none !important;
}
*/


/*
  Header UI styles
*/

body.notebook_app>#header {
    display: block !important;
}

.notebook_app>#header,
.edit_app>#header {
    background-color: #333;
    color: #b7b7b7;
    -webkit-box-shadow: 0 6px 12px rgba(0, 0, 0, 0.3);
    box-shadow: 0 6px 12px rgba(0, 0, 0, 0.3);
}

.edit_app #menubar .navbar {
    margin-bottom: 0;
}

body>#header .header-bar {
    background: #444;
}

#header .navbar-brand {
    display: none;
}

#header .filename {
    margin-left: 0;
    margin-right: 2em;
}

#header .current_kernel_logo {
    width: 24px;
    height: 24px;
}

span.save_widget span.filename:hover {
    background: rgba(255, 255, 255, 0.15);
    color: #fff;
    text-shadow: 0px 1px 1px rgba(0, 0, 0, 0.5);
}

.navbar-default {
    background: transparent;
    color: #b7b7b7;
    border-color: #444;
}

.navbar-default .navbar-nav>li>a:hover,
.navbar-default .navbar-nav>li>a:focus {
    color: #fff;
}

.navbar-default .navbar-nav>.open>a,
.navbar-default .navbar-nav>.open>a:hover,
.navbar-default .navbar-nav>.open>a:focus {
    color: #fff;
    background-color: #444;
}

@media not print {
    .notebook_app #notebook {
        background: #111;
    }
    .notebook_app #notebook-container,
    .edit_app #texteditor-backdrop {
        background: #272727;
    }
}


/*
  Inverting the notebook editor UI
*/

.celltoolbar {
    border-color: #444;
    background: #444;
    color: #b7b7b7;
}

.ctb_global_show .ctb_show~div.text_cell_render {
    border-color: #444;
}

.celltoolbar select {
    opacity: 0.5;
}

.modal-dialog .modal-content,
.popover,
.popover .popover-title {
    background: rgba(50, 50, 50, 0.95);
    color: #b7b7b7;
}

.modal-header,
.popover-title {
    border-bottom-color: #444;
}

.modal-footer {
    border-top-color: #444;
}

.modal-dialog .close {
    color: #fff;
    text-shadow: 0 1px 0 #000;
}

.modal-dialog .alert-info {
    background-color: #373E42;
    color: #d9edf7;
}

.popover.bottom>.arrow:after {
    border-bottom-color: #444;
}

.btn:focus,
.btn:active:focus {
    outline: 5px auto rgba(102, 175, 233, 0.3);
    outline-offset: -1px;
}

.btn-default {
    background-color: #555;
    border-color: #222;
    box-shadow: 0 0 1px rgba(0, 0, 0, 0.5);
    color: #d2d2d2;
}

.btn-default:focus,
.btn-default:hover {
    background-color: #555;
    border-color: #222;
    box-shadow: 0 0 3px rgba(0, 0, 0, 0.8);
    color: #bbb;
}

.btn-default:active,
.btn-default.active,
.open>.dropdown-toggle.btn-default {
    background-color: #474747;
    color: #999;
    box-shadow: inset 0 3px 5px rgba(0, 0, 0, 0.2);
}

.btn-default.disabled:focus,
.btn-default.disabled:hover,
.btn-default[disabled]:focus,
.btn-default[disabled]:hover {
    background-color: #555;
    border-color: #222;
    box-shadow: 0 0 1px rgba(0, 0, 0, 0.5);
    color: #aaa;
}

.btn-default:active:hover,
.btn-default:active:focus,
.open>.dropdown-toggle.btn-default:hover,
.open>.dropdown-toggle.btn-default:focus {
    background-color: #474747;
    color: #999;
    border-color: #222;
    box-shadow: inset 0 3px 5px rgba(0, 0, 0, 0.2);
}

.btn-primary {
    color: #eee;
    background-color: #4481b7;
    border-color: #222;
    box-shadow: 0 0 2px rgba(0, 0, 0, 0.5);
}

.btn-primary:focus,
.btn-primary:hover {
    background-color: #4481b7;
    color: #fff;
}

.btn-primary:active {
    background-color: #306ea6;
    color: #ccc;
}

.btn-primary:active:hover,
.btn-primary:active:focus {
    background-color: #306ea6;
    color: #ccc;
}

.form-control {
    background: #222;
    color: #eee;
    border-color: #777;
}

.form-control:focus {
    border-color: #458ac1;
    box-shadow: inset 0 1px 1px rgba(0, 0, 0, .075), 0 0 8px rgba(102, 175, 233, 0.3);
}

.form-control::selection {
    background: rgba(221, 240, 255, 0.19);
}

#complete {
    border-color: #444;
    background: rgba(50, 50, 50, 0.95);
    color: #b7b7b7;
    -webkit-box-shadow: 0 6px 12px rgba(0, 0, 0, 0.3);
    box-shadow: 0 6px 12px rgba(0, 0, 0, 0.3);
}

.completions select {
    background: rgba(50, 50, 50, 0.95);
    color: #b7b7b7;
}


/*
  Set fonts and styles for outputted content
*/

div#notebook .text_cell_render {
    font-size: 16.25px;
    font-weight: 300;
    line-height: 1.25;
}

.rendered_html li p {
    margin-top: 1em;
}

.rendered_html h1 {
    color: #CF4A4C;
}

div.output_html {
    font-family: sans-serif;
}


/*
  Set colors and styles that we only want on the screen, not for print
*/

@media not print {
    .notebook_app div.cell.running .input .input_area {
        border-color: #eea236;
        border-width: 4px;
        -webkit-animation-name: pulseBorder;
        -webkit-animation-duration: 1s;
        -webkit-animation-iteration-count: infinite;
        -webkit-animation-direction: alternate;
        -webkit-animation-timing-function: ease-in-out;
    }
    @-webkit-keyframes pulseBorder {
        from {
            border-color: #82591E;
        }
        to {
            border-color: #eea236;
        }
    }
    .notebook_app div.input_prompt {
        color: #eaab63;
    }
    .notebook_app div.output_prompt {
        color: #c1acc3;
    }
    .notebook_app div.input_area {
        border-radius: 0px;
        border: 1px solid #464b50;
    }
    .notebook_app div.output_subarea {
        max-width: 100%;
    }
    .notebook_app div.output_area pre {
        font-weight: normal;
        color: #dedede;
    }
    .notebook_app div.output_subarea {
        font-weight: normal;
        color: #979797;
    }
    .notebook_app div.output_stderr {
        background-color: #457682;
    }
    .notebook_app div.output_stderr pre {
        color: #eee;
    }
    .notebook_app .rendered_html table,
    .notebook_app .rendered_html th,
    .notebook_app .rendered_html tr,
    .notebook_app .rendered_html td {
        border: 1px #979797 solid;
        color: #d6d6d6;
    }
    .rendered_html tbody tr:nth-child(odd) th,
    .rendered_html tbody tr:nth-child(odd) td {
        color: #5d5d5d;
    }
    .notebook_app div.text_cell_render,
    .notebook_app div.output_html {
        color: #e4e4e4
    }
    .notebook_app table.dataframe tr {
        border: 1px #979797;
    }
    .notebook_app .rendered_html pre,
    .notebook_app .rendered_html code {
        border: 0;
        background-color: #444;
        color: #f3f3f3;
        padding: 0;
    }
}


/*
  Terminal text coloring
*/

span.ansiblack {
    color: #323537;
}

span.ansiblue {
    color: #afc4db;
}

span.ansigray {
    color: #838184;
}

span.ansigreen {
    color: #8f9d6a;
}

span.ansipurple {
    color: #9b859d;
}

span.ansired {
    color: #cf6a4c;
}

span.ansiyellow {
    color: #f9ee98;
}


/*
  Code editing
*/

.CodeMirror {
    background: #141414;
    color: #F8F8F8;
}

div.CodeMirror-selected {
    background: rgba(221, 240, 255, 0.19) !important;
}

#texteditor-backdrop #texteditor-container .CodeMirror-gutter,
.CodeMirror-gutters {
    background: #444;
    border-right: 0px;
    color: #777;
}

.CodeMirror-linenumber {
    color: #b4b7b4;
}

.CodeMirror-cursor {
    border-left: 1px solid #A7A7A7 !important;
    margin-top: -2px;
    min-height: 18px;
}

.CodeMirror span.cm-comment {
    color: #50a703;
    font-style: italic;
}

.CodeMirror span.cm-atom {
    color: #CF6A4C;
}

.CodeMirror span.cm-number {
    color: #aece92;
}

.CodeMirror span.cm-property {
    color: #59cbd8;
}

.CodeMirror span.cm-attribute {
    color: #198844;
}

.CodeMirror span.cm-keyword {
    color: #d288ff;
    font-weight: normal;
}

.CodeMirror span.cm-string {
    color: #ff9f83;
}

.CodeMirror span.cm-string-2 {
    color: #E9C062;
}


/* regexp */

.CodeMirror span.cm-operator {
    color: #d8d6d6;
}

.CodeMirror span.cm-builtin {
    color: #52f78e;
}

.CodeMirror span.cm-variable {
    color: #d8d6d6;
}

.CodeMirror span.cm-variable-2 {
    color: #7587A6;
}

.CodeMirror span.cm-variable-3 {
    color: #7587A6;
}

.CodeMirror span.cm-def {
    color: #aece92;
}

.CodeMirror span.cm-error {
    color: #F8F8F8;
    background-color: rgba(86, 45, 86, 0.2);
}

.CodeMirror span.cm-bracket {
    color: #373b41;
}

.CodeMirror span.cm-tag {
    color: #7587A6;
}

.CodeMirror span.cm-link {
    color: #A36AC7;
}

.CodeMirror .CodeMirror-matchingbracket {
    background-color: #dd3;
    color: #303030 !important;
}


/*
  Markdown editing
*/

.cm-s-default span.cm-header {
    color: #CF4A4C;
}

.cm-s-default span.cm-variable-2 {
    color: #7587A6;
}

.cm-s-default span.cm-comment {
    color: #7F7A80;
}
</style>
`);


function notify(message, notebook_name) {
    if (Notification.permission !== "granted") {
        Notification.requestPermission();
    } else {
        var notification = new Notification(message, {
            body: notebook_name,
        });
    }
}

$([IPython.events]).on('kernel_starting.Kernel', function() {
    notify("kernel starting..", IPython.notebook.notebook_name);
});

$([IPython.events]).on('kernel_busy.Kernel', function() {
    // notify("kernel busy now..", IPython.notebook.notebook_name);
    console.log("kernel busy now..")
});

$([IPython.events]).on('kernel_idle.Kernel', function() {
    notify("Pyconsole command execution completed.", IPython.notebook.notebook_name);
});