[Joe Staff]

@Fedee:

pawn Code:

#include <a_samp>
#include <j_fader_v2>
new Float:gTmp;
new Float:pOldHealth[MAX_PLAYERS];
new Float:vSpeed[MAX_PLAYERS];
new Float:gtemp[4]; //global temporary variables
new JustDied[MAX_PLAYERS];
public OnFilterScriptInit()
{
  FadeInit();
  return 1;
}
public OnFilterScriptExit()
{
  FadeExit();
  return 1;
}
public OnPlayerConnect(playerid)
{
  FadePlayerConnect(playerid);
  JustDied[playerid]=0;
  return 1;
}
public OnPlayerDisconnect(playerid,reason)
{
  FadePlayerDisconnect(playerid);
  return 1;
}
public OnPlayerDeath(playerid,killerid,reason)
{
  FadeColorForPlayer(playerid,255,0,0,0,255,0,0,255,25,1000);
  JustDied[playerid]=1;
  return 1;
}
public OnPlayerSpawn(playerid)
{
    if(JustDied[playerid])
    {
    FadeColorForPlayer(playerid,255,0,0,255,255,0,0,0,25,0);
    JustDied[playerid]=0;
    }
  return 1;
}
public OnPlayerStateChange(playerid,newstate,oldstate)
{
    if(newstate==PLAYER_STATE_ONFOOT)vSpeed[playerid]=0;
    return 1;
}
public OnPlayerUpdate(playerid)
{
  GetPlayerHealth(playerid,gTmp);
  if(pOldHealth[playerid]>gTmp)
  {
    FadeColorForPlayer(playerid,255,0,0,floatround(pOldHealth[playerid]-gTmp)*10,255,0,0,0,floatround(pOldHealth[playerid]-gTmp),0);
  }
  pOldHealth[playerid]=gTmp;
  if(IsPlayerInAnyVehicle(playerid))
  {
    GetVehicleVelocity(GetPlayerVehicleID(playerid),gtemp[0],gtemp[1],gtemp[2]);
    gtemp[3]=floatsqroot( floatmul(gtemp[0],gtemp[0])+floatmul(gtemp[1],gtemp[1])+floatmul(gtemp[2],gtemp[2]) )*100;
    if(vSpeed[playerid]-gtemp[3]>20)FadeColorForPlayer(playerid,255,0,0,(floatround(vSpeed[playerid]-gtemp[3])-20)*3,255,0,0,0,floatround(vSpeed[playerid]-gtemp[3])-20,0);
    vSpeed[playerid]=gtemp[3];
  }
  return 1;
}

I haven't tested that, but I will later on. If it works I'll add it to the front page.

Tested and it works great
I even guessed the vehicle speeds correctly, lol.