static Map_Pipes[ 4 ], bool: In_Use[ 4 ]
static const Pipes_List[][] = {
	"pipe1",
	"pipe2",
	"pipe3",
	"pipe4"
}

public plugin_init() {
	RegisterHam( Ham_Use, "func_button", "Ham_Use" )
	LoadMapEvents()
}

public LoadMapEvents() {
	Map_Pipes[ 0 ] = engfunc( EngFunc_FindEntityByString, Map_Pipes[ 0 ], "targetname", "pipe1" )
	Map_Pipes[ 1 ] = engfunc( EngFunc_FindEntityByString, Map_Pipes[ 1 ], "targetname", "pipe2" )
	Map_Pipes[ 2 ] = engfunc( EngFunc_FindEntityByString, Map_Pipes[ 2 ], "targetname", "pipe3" )
	Map_Pipes[ 3 ] = engfunc( EngFunc_FindEntityByString, Map_Pipes[ 3 ], "targetname", "pipe4" )
}

public Ham_Button( ent, idcaller, idactivator, use_type, Float:value ) {
	if( ent == Map_Pipes[ 0 ] ) In_Use[ 0 ] = false
	if( ent == Map_Pipes[ 1 ] ) In_Use[ 1 ] = false
	if( ent == Map_Pipes[ 2 ] ) In_Use[ 2 ] = false
	if( ent == Map_Pipes[ 3 ] ) In_Use[ 3 ] = false
}

public test( iEnt ) { //======> Моя функция, где вызывается абилити
	static Random_Pipe
	Random_Pipe = random( charsmax( Map_Pipes ) )
	switch( Random_Pipe ) {
		case 0: In_Use[ 0 ] = true
		case 1: In_Use[ 1 ] = true
		case 2: In_Use[ 2 ] = true
		case 3: In_Use[ 3 ] = true
	}
	new ent = -1;
	while( ( ent = engfunc( EngFunc_FindEntityByString, ent, "targetname", Pipes_List[ Random_Pipe ] ) ) > 0 ) {
		set_pev( Map_Pipes[ Random_Pipe ], pev_body, 1 )
		set_rendering( Map_Pipes[ Random_Pipe ], kRenderGlow, 255, 255, 255, kRenderFxFadeSlow, 150 )
	}
}