anchor.diff:    clear:both;
   }
   </style>
  +
  +<%
  +  colors = (sesh[:colors] || ['lightblue','lightyellow','#ffd5dc','orange'].shuffle).to_a
  +%>
  +
   <div class='main'>
     <% if part2 %>
     <% risky_val_a = potential_risky_val(sesh[:group_num], sesh[:stepNum].to_i) %>
  
positive.code:     <div class='estimate ct'>In the next trial, the following keys will be presented:</div>
      <div class='please_select invisible'>Now please select the key you prefer</div>
      <% end %>
      <button class='btn btn-lg btn-info btn-raised btn-left' style='background-color: <%=sesh[:colors][0]%>' onclick=buttonClick(this,'left')></button>
      <button class='btn btn-lg btn-warning btn-raised btn-right' style='background-color: <%=sesh[:colors][1]%>' onclick=buttonClick(this,'right')></button>
      <% if part2 %>
      <div class='estimate'>
      <span class='guess_area guess_area_top'>
  
negative.code:     <div class='estimate ct'>In the next trial, the following keys will be presented:</div>
      <div class='please_select invisible'>Now please select the key you prefer</div>
      <% end %>
      <button class='btn btn-lg btn-info btn-raised btn-left' style='background-color: <%=colors[2]%>' onclick=buttonClick(this,'left')></button>
      <button class='btn btn-lg btn-warning btn-raised btn-right' style='background-color: <%=colors[3]%>' onclick=buttonClick(this,'right')></button>
      
      <% if part2 %>
      <div class='estimate'>
  