Overwrite with "printf" command

[Matorra]

I'm trying to put on the lcd a number with the command "printf", but the screen writes the number over the previous one, so the result is a colored square in a short time.
I attach the code I'm using in case anyone can help me, thanks in advance.

#include <M5Stack.h>
…….
double tiempoSegundos= 0;
void Printseg() // Presenta los seg en pantalla
{
M5.lcd.setCursor(0,180);
M5.Lcd.printf(" %6.3f",tiempoSegundos );
}
void setup() {
M5.begin(); // inicio del M5S:

…..
void loop() {
……
Printseg(); }

[robalstona]

1 clear whole screen before print (possible flicker screen)
2 print same text on the same position with background color
3 draw filled rectangle with background color that cover area where text was printed

[Matorra]

Yes, correct I used the " M5.Lcd.setTextColor (YELLOW, BLACK);" in the setup command , and effectively overwriting by deleting the above. Thank you.
Greetings.