Plot_daily_steps.jl

df_pedometer_filter |> @vlplot("mark"={:area, "line" = {"color" = "seagreen"},
        				               "color"={"x1"=1, "y1"=1, "x2"=1, "y2"=0,
           				             "gradient"=:linear, "stops" = [
               			           {"offset"=0, "color"="white"},
                		           {"offset"=1, "color"="green"}]}}, 
	x = {:create_time, "axis" = {"title" = "Time", "labelFontSize" = 12, "titleFontSize" = 14}, "type" = "temporal"}, 
	y = {:step_count, "axis" = {"title" = "Daily steps", "labelFontSize" = 12, "titleFontSize" = 14 }}, 
	width = 750, height = 500, 
	"title" = {"text" = "Daily steps from $(Date.(start_date)) to $(Date.(end_date))", "fontSize" = 16})