app/views/timeline/_hour.html.erb
<li style="width: <%= 100/@hours_per_day.to_f %>%; left: <%= hour_counter*100/@hours_per_day.to_f %>%;" >
<div class="hours">
<div class="center_container">
<div class="center_content">
<%= hour %>
</div>
</div>
</div>
<%= render partial: "shifts/schedule/minutes", collection: (0...(@blocks_per_hour-1)).to_a %>
</li>