wall1.xml

<?xml version="1.0" encoding="UTF-8" standalone="no" ?>
<Mission xmlns="http://ProjectMalmo.microsoft.com" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance">

  <About>
    <Summary>Wall Avoidance [Increment 1]</Summary>
  </About>

  <ServerSection>
    <ServerInitialConditions>
        <Time><StartTime>1</StartTime></Time>
    </ServerInitialConditions>
    <ServerHandlers>
      <FlatWorldGenerator forceReset="true" generatorString="3;7,220*1,5*3,2;3;,biome_1"/>
      <DrawingDecorator>
        <!-- coordinates for cuboid are inclusive -->
        <DrawCuboid x1="-5" y1="41" z1="-5" x2="5" y2="50" z2="5" type="air" />     
        <DrawCuboid x1="-5" y1="50" z1="-5" x2="5" y2="50" z2="5" type="glowstone" />           
        <DrawCuboid x1="-5" y1="45" z1="-5" x2="5" y2="45" z2="5" type="sandstone" />            
        <DrawCuboid x1="-2" y1="45" z1="-2" x2="2" y2="50" z2="2" type="stone" />            
      </DrawingDecorator>
      <ServerQuitFromTimeUp timeLimitMs="2000"/>
      <ServerQuitWhenAnyAgentFinishes/>
    </ServerHandlers>
  </ServerSection>

  <AgentSection mode="Survival">
    <Name>Cristina</Name>
    <AgentStart>
      <Placement x="0.5" y="46.0" z="-4.5" pitch="0" yaw="0"/>
    </AgentStart>
    <AgentHandlers>
      <DiscreteMovementCommands/>
      <ObservationFromGrid>
        <Grid name="ahead">
          <min x="-1" y="1" z="-1" />
          <max x="1" y="1" z="1" />
        </Grid>
        <Grid name="ground">
          <min x="-1" y="0" z="-1" />
          <max x="1" y="0" z="1" />
        </Grid>
        <Grid name="floor">
          <min x="-1" y="-1" z="-1" />
          <max x="1" y="-1" z="1" />
        </Grid>
      </ObservationFromGrid>
      <ObservationFromFullStats/>
    </AgentHandlers>
  </AgentSection>

</Mission>