I need your help,

What I want is to click the button all the time to display ABCDE


if(show_data)
{

ObjectSetInteger(ChartID(),buttonId,OBJPROP_COLOR,btn_text_ON_color);
ObjectSetString(ChartID(),buttonId,OBJPROP_TEXT,"button:A");

if(show_data)
{
ObjectSetInteger(ChartID(),buttonId,OBJPROP_COLOR,btn_text_ON_color);
ObjectSetString(ChartID(),buttonId,OBJPROP_TEXT,"button:B");
}
else
{


ObjectSetInteger(ChartID(),buttonId,OBJPROP_COLOR,btn_text_OFF_color);
ObjectSetString(ChartID(),buttonId,OBJPROP_TEXT,"button:C");

}}

else
if(show_data)
{
ObjectSetInteger(ChartID(),buttonId,OBJPROP_COLOR,btn_text_ON_color);
ObjectSetString(ChartID(),buttonId,OBJPROP_TEXT,"button:D");
}
else
{


ObjectSetInteger(ChartID(),buttonId,OBJPROP_COLOR,btn_text_OFF_color);
ObjectSetString(ChartID(),buttonId,OBJPROP_TEXT,"button:E");

thank you