This is one of the default TPV presets, named Eno Would Be Proud (most likely inspired by Brian Eno) that we changed around a bit for our simulators. Given that you have made the appropriate changes on the category super-page, drop the following script into a primitive and make sure that you are using a WindLight enabled viewer.

deep_blue_sky.lsl

///////////////////////////////////////////////////////////////////////////
//  Copyright (C) Wizardry and Steamworks 2012 - License: GNU GPLv3      //
//  Please see: http://www.gnu.org/licenses/gpl.html for legal details,  //
//  rights of fair usage, the disclaimer and warranty conditions.        //
///////////////////////////////////////////////////////////////////////////
// Inspired from the template Eno Would Be Proud
 
default {
  state_entry() {
    integer success = lsSetWindlightScene([ WL_WATER_COLOR, <13, 97, 135>, WL_WATER_FOG_DENSITY_EXPONENT, 0.0, WL_UNDERWATER_FOG_MODIFIER, 0.25, WL_REFLECTION_WAVELET_SCALE, <2.0, 2.0, 2.0>, WL_FRESNEL_SCALE, 0.10, WL_FRESNEL_OFFSET, 0.58, WL_REFRACT_SCALE_ABOVE, 0.08, WL_REFRACT_SCALE_BELOW, 0.20, WL_BLUR_MULTIPLIER, 0.003, WL_BIG_WAVE_DIRECTION, <0.50, -0.17, 0>, WL_LITTLE_WAVE_DIRECTION, <0.58, -0.67, 0>, WL_NORMAL_MAP_TEXTURE, "822ded49-9a6c-f61c-cb89-6df54f42cdf4", WL_HAZE_HORIZON, 0.33, WL_BLUE_DENSITY, <0.13, 0.21, 0.34, 0.34>, WL_HORIZON, <0.24,0.40,0.46,0.46>, WL_DENSITY_MULTIPLIER, 0.01, WL_DISTANCE_MULTIPLIER, 0.7, WL_MAX_ALTITUDE, 711, WL_SUN_MOON_COLOR, <0.21,0.23,0.29,0.29>, WL_AMBIENT, <0.09,0.15,0.25,0.25>, WL_SUN_MOON_POSITION, 0.375, WL_EAST_ANGLE, 0.50, WL_SUN_GLOW_SIZE, 1.79, WL_SUN_GLOW_FOCUS, 0.10, WL_SCENE_GAMMA, 1.61, WL_STAR_BRIGHTNESS, 0.00, WL_CLOUD_COLOR, <0.53,0.53,0.53,0.53>, WL_CLOUD_XY_DENSITY, <0.73,0.34,0.33>, WL_CLOUD_COVERAGE, 0.26, WL_CLOUD_SCALE, 0.33, WL_CLOUD_DETAIL_XY_DENSITY, <0.29,0.85,0.02>, WL_CLOUD_SCROLL_X, 0.50, WL_CLOUD_SCROLL_Y, 0.51, WL_CLOUD_SCROLL_Y_LOCK, 0, WL_CLOUD_SCROLL_X_LOCK, 0, WL_DRAW_CLASSIC_CLOUDS, 1 ]);
    if ( success == TRUE ) {
      llOwnerSay("WindLight set.");
      return;
    }
    llOwnerSay("Failed to set WindLight.");
  }
}