function plotGround(V,G,PT,i,speed,steps)
    subplot(1,2,1);
    imagesc(G);
    axis equal;
    hold on;
    plot(PT(:,2),PT(:,1),'ms',...
                'LineWidth',2,...
                'MarkerEdgeColor','k',...
                'MarkerFaceColor','g',...
                'MarkerSize',8);
    hold off;
    title(['Pedestrians and Ground at step ' int2str(i)]);
    subplot(1,2,2);
    imagesc(V);
    axis equal;
    pause(speed/steps);

    if mod(i,20) == 1
        title(['jo ']);
        fig = subplot(1,2,1);
        imagesc(G);
        colorbar; axis equal; hold on;
        plot(PT(:,2),PT(:,1),'ms',...
                    'LineWidth',2,...
                    'MarkerEdgeColor','k',...
                    'MarkerFaceColor','g',...
                    'MarkerSize',8);
        hold off;
        title(['Pedestrians and Ground at step ' int2str(i)]);
        subplot(1,2,2);
        imagesc(V);
        colorbar; axis equal;

        s = ['plot-step' int2str(i) '.png'];
        saveas(fig, s)
    end