<button class="btn-space">Space</button>
        <button class="btn-power">Power</button>
        <button class="btn-reality">Reality</button>
        <button class="btn-soul">Soul</button>
        <button class="btn-time">Time</button>
        <button class="btn-mind">Mind</button>
                        

        <button class="btn-space btn-flex btn-block">btn-flex</button>
        <button class="btn-power wi-20">wi-20</button>
        <button class="btn-reality wi-40">wi-40</button>
        <button class="btn-soul wi-60">wi-60</button>
        <button class="btn-time wi-80">wi-80</button>